63 (number)

63 (sixty-three) is a natural number following 62 and preceding 64.

In mathematics

63 is:

• a deficient composite number.
• a highly cototient number.^[1]
• a number of the form 2ⁿ − 1 (with n = 6), but it is not a Mersenne prime since n is not prime and 63 is certainly not prime either.
• a Woodall number i.e. of the form 2ⁿn − 1 with n = 4.^[2]
• the third Delannoy number.^[3]
• the smallest whole number that can be divided by any number from 1 to 9 without repeating decimals.
• the sum of the powers of 2 from 0 to 5.
• palindromic and a repdigit in bases 2 (111111₂), 4 (333₄), 8 (77₈), 20 (33₂₀) and 62 (11₆₂).
• a Harshad number in bases 3, 4, 5, 7, 9, 10 and 15.

63 has an aliquot sum of 41.

In science

• The atomic number of europium, a lanthanide

Astronomy

• Messier object M63, a magnitude 8.5 galaxy in the constellation Canes Venatici, also known as the Sunflower Galaxy.
• The New General Catalogue object NGC 63, a spiral galaxy in the constellation Pisces
• The Saros number of the solar eclipse series which began on -879 April 20 and ended on 401 May. The duration of Saros series 63 was 1280.1 years, and it contained 72 solar eclipses.
• The Saros number of the lunar eclipse series which began on -758 October 12 and ended on 739 March. The duration of Saros series 63 was 1496.5 years, and it contained 84 lunar eclipses.

In other fields

Sixty-three is also:

• The code for international direct dial calls to the Philippines
• The hull number of the U.S. Navy's aircraft carrier USS Kitty Hawk (CV-63) and the USS Missouri BB63
• The number of the French department Puy-de-Dôme
• The number of groats in a guinea in British pre-decimal currency
• A card game, popular in Carleton County, New Brunswick
• The Stoner 63, a machine gun
• The number of chromosomes found in the offspring of a donkey and a horse
• Class of '63 was a TV movie starring James Brolin (1973)

In sports

• Tom Dempsey of New Orleans Saints, Nov. 8, 1970, Jason Elam of the Denver Broncos, Oct. 25, 1988, Sebastian Janikowski of the Oakland Raiders, Sep. 12, 2011 and David Akers^[4] of the San Francisco 49ers, Sept. 9, 2012 had NFL record 63-yard field goals
• Michael Jordan scored a record 63 points in a Chicago Bulls –Boston Celtics (double-overtime) NBA playoff game on April 20, 1986
• In U.S. college athletics, schools that are members of NCAA Division I FCS are allowed to provide their football players with athletically-related financial aid equivalent to a total of 63 full athletic scholarships in a given season.
• Cricketer Phillip Hughes died during a match whilst on a personal score of 63 runs.

In Religion

• There are 63 Tractates in the Mishna, the compilation of Jewish Law.
• There are 63 Saints in South Indian Shaivism
• There are 63 Salakapurusas (great beings) in Jain cosmology

References

1. ↑ "Sloane's A100827 : Highly cototient numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30. 
2. ↑ "Sloane's A003261 : Woodall numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30. 
3. ↑ "Sloane's A001850 : Central Delannoy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30. 
4. ↑ http://www.nfl.com/news/story/0ap1000000060091/article/david-akers-ties-nfl-record-with-63yard-field-goal