39 (number)

39 (thirty-nine) is the natural number following 38 and preceding 40.

In mathematics

• 39 is the 12th distinct semiprime^[1] and the 4th in the (3.q) family.^[2] It is the last member of the third distinct semiprime pair (38,39).
• 39 has an
  1,0) to the Prime in the 17
  -aliquot tree.
• It is a
  0.^[4]
• 39 is the smallest natural number which has three partitions into three parts which all give the same product when multiplied: {25, 8, 6}, {24, 10, 5}, {20, 15, 4}.

• 39 is a Perrin number, coming after 17, 22, 29 (it is the sum of the first two mentioned).^[5]
• Since the greatest prime factor of 39² + 1 = 1522 is 761, which is more than 39 twice, 39 is a Størmer number.^[6]
• The F26A graph is a symmetric graph with 39 edges.

In science

• The atomic number of yttrium

Astronomy

• Messier object
  magnitude 5.5 open cluster in the constellation Cygnus
• The New General Catalogue object NGC 39, a spiral galaxy in the constellation Andromeda

In religion

• The number of the
  39 categories of activity prohibited on Shabbat according to Halakha
• The number of mentions of work or labor in the Torah
• The actual number of lashes given by the Sanhedrin to a person meted the punishment of 40 lashes
• The number of books in the Old Testament according to Protestant canon
• The number of statements on
  Thirty-Nine Articles

In other fields

Arts and entertainment

• In the title of the John Buchan novel and subsequent films (one by Alfred Hitchcock), The Thirty-Nine Steps
• The age American comedian Jack Benny claimed to be for more than 40 years
• "39" is a song by the Cure on their album Bloodflowers
• "39" is a song by Tenacious D on their album Rize of the Fenix
• "'39" is a song by Queen on their album A Night at the Opera
• The book series The 39 Clues revolves around 39 clues hidden around the world
• Glorious 39 is a 2009 drama film set at the beginning of World War II
• In the
  Survivor
  , contestants compete for 39 days
• The number of episodes done during its one season in 1955–1956 of The Honeymooners television series is commonly referred to as the "Classic 39"
• Japanese wordplay and slang:
  • Internet chat slang for "Thank You" when written with numbers: 3 (三, san) and 9 (九, kyū)^[7]
  • This number is also considered to be the lucky number of Hatsune Miku due to the digits 3 and 9 being pronounceable as "mi" and "ku", respectively.

History

• The number of signers to the
  United States Constitution
  , out of 55 members of the Philadelphia Convention delegates
• The traditional number of times citizens of
  one
  "
• The duration, in nanoseconds, of the nuclear reaction in the largest nuclear explosion ever performed (Tsar Bomba)
• The number of
  Scud missiles which Iraq fired at Israel during the Gulf War
  in 1991
• The code for international direct-dialed phone calls to Italy
• Pier 39 in San Francisco
• The number of the French department Jura
• In
  pimps. See Curse of 39.^[8]
• The bowling lane normally consists of 39 wooden boards

See also

• List of highways numbered 39

References