On 90

In Language – 90 is ninety, nëntëdhjetë (Albanian), noranta (Catalan), novanta (Italian), devetdeset (Slovenian), naw deg (Welsh), and XC (Roman numerals)

In Mathematics

90 – divisible by 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

90 – a natural number, unitary perfect number, a semiperfect number, a pronic number, a nontotient number, a Perrin number, a Harshad number, and a palindromic number and a repdigit in bases 14, 17, 29, and 44

90 – the number of degrees in a right angle

In Science

90 – the atomic number of thorium (Th), whose neutrally charged atom contains 90 protons and 90 electrons

90 – the number of chromosomes in cells of moonworts, African hedgehog, Grape fern, and Sweet potato

In Sports

Nike Total 90 Apparel – a brand name of football apparel and equipment

90 feet – the distance between bases on a Major League Baseball diamond (27 m)

90 – the car number most associated with former NASCAR team owner Junie Donlavey

90 – the number of minutes in a football (soccer) match

90 Retired sports numbers: only NFL: Dennis Byrd (NY Jets)

In Geography

Photo from pexels.com

90 – the latitude in degrees of the North and the South geographical poles

90th Meridian West crosses land in Canada, United States, Mexico, Guatemala, El Salvador

90th Meridian East crosses land in Russia, Mongolia, China, Bhutan, India, and Bangladesh

I-90 – the longest interstate highway in the US system (3,020.54 miles/4,861.09 km) connecting Seattle and Boston

90 – national highways in Canada, Israel, New Zealand, and the United States

In Entertainment

Joe 90 – a sci-fi series on British television (1968-1969)

90th Academy Awards (2017) with Shape of Water winning 4 Oscars

Image from vector-images.com

In Music

Route 90 (Johnny Winter)

The Ninety and Nine (Tennessee Ernie Ford)

‘90s is not 90

In Literature

The First 90 Days (Michael Watkins)

90 Minutes in Heaven (Don Piper and Cecil Murphey)

90 Miles to Havana (Enrique Flores-Galbis)

Ninety Percent Mental: An All-Star Player Turned Mental Skills Coach Reveals the Hidden Game of Baseball (Bob Tewksbury and Scott Miller)

Ninety Degrees North: The Quest for the North Pole (Fergus Fleming)

In Business

90 Minute IPA (an ale brewed by Dogfish Head Brewery)

90+ Cellars (an online wine retailer)

In History

Year 90 CE

  • A common year starting on a Friday
  • Assyrian calendar year 4850, Discordian calendar year, 1256, Holocene calendar year 10090
  • Cologne becomes the capital of Germania Inferior
  • Young Flavian Woman sculpture made (now kept at Musei Capitolini, Rome)
  • Drafting of the Gospel of John and the Acts of the Apostles
  • Born – Ptolemy, Greek mathematician, geographer, astronomer, and astrologer (d. c. 168)

Year 90 BC

  • Ab urbe condita calendar year 664, Korean calendar year 2244, Holocene calendar year 9911, Berber calendar year 861
  • Rome grants the Etruscans Roman citizenship
  • Cicero starts to serve in the Roman army


90 – the calling code for international direct-dial phone calls to Turkey

Change 90 – a right-wing political party in Peru

90 proof – the measure of alcohol in Maker’s Mark Bourbon

GE 90 – a family of jet engines built by GE Aviation in Cincinnati

TAZ 90 – the camouflage pattern used as on the battle dress of the Swiss Armed Forces

90 – how old my mother would be if still living today (she died in 1984). Her birthday was a month ago (23rd Sept), and the day our Eastern Europe tour started.

This song does not have any version of ninety in the title, but my mother would have loved this singer and his son. Thinking of her when I first watched this video caused a few tears.

42 thoughts on “On 90

  1. Hello Frank! I just learned something 🙂 I thought we can’t possibly have 90 highways here, we simply aren’t that big. So I checked and according to Wikipedia we have 99 – who knew!! Thank you for giving such a great run down of the number 90 – it’s fun to run through it all.
    And I love that father and son duet, it is so touching. I watch it and think Andrea is aging now and begins to look delicate and his beautiful young son is picking up the Bocelli baton – it brings a lump to my throat. I also think it is a wonderful thing that you remember your mother with love and a tear or two at certain times – she passed quite young.

    Liked by 1 person

  2. You lost your mother while she was still quite young and I’m sure that each birthday since you think of her with a pang of longing. Your research into the number 90 is incredible, Frank. I don’t think i knew hardly one fact you’ve included. My head spins! Now the video is wonderful. Thank you for that.


    • Debra,
      For whatever reason, the idea that I’ve lived longer than her hits me the most on my birthday … and of course this post served as another reminder. For whatever reason, I like doing these posts. 🙂 … Thanks for the kind words.


  3. Frank,

    Your mother was only fifty six when you lost her. You really put a lot of work into this post- as per usual- but I must tell you how touching that video is when you describe what it means.

    Blessings and peace to you my friend


  4. Your mother continues to live in your heart, and I remember your thoughts about her when you visited her homeland not so long ago. Celebrating her birthday seems quite natural both for you and for your friends who know how much you love her. May her birthday be a very happy celebration… and a reminder of how much she appreciated her adopted country, and accepted it, the good with the bad…

    Liked by 1 person

    • Shimon,
      Interesting how certain days serve as reminders – birthdays, & Mother’s Day are two – then there are the days when someone pops into the mind out of nowhere. Thanks for the good thoughts!


    • Daff,
      Thank you for the kind words, and more importantly, many thanks for sharing a bit of our story. Whenever I do a salute post to a number, I always have a reason (and some miss it) – so the fact that you got it on your first journey here made me smile.

      Liked by 1 person

  5. Learning that Cicero started to serve in the Roman army in the year 90 BC led me to discover the following quotes from his writings:

    “A room without books is like a body without a soul.”

    “If you have a garden and a library, you have everything you need.”

    “While there’s life, there’s hope.”

    Liked by 1 person

  6. Beautiful video, Frank. Happy birthday to your mother who still lives in your heart.

    That 90 Minute IPA from Dogfish Head is a doozy. High alcohol content and very hoppy. My kind of beer before I became a teetotaler. 🙂

    Liked by 1 person

  7. Another wonderful number post. These are always intriguing and entertaining. When I flip the 9 over and the 0 over, I get 60. (no reverses, just flip overs) Cheers to your mom! I miss mine, too.
    Well, guess I’ll go. I’ve got 90 minutes to make dinner! ❦❦❦

    Liked by 1 person

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