82 = 22 x 3 x 7.
84 has a unique representation as a sum of three squares: 84 = 22 + 42 + 82.
84 is the smallest number with eight representations as a sum of two primes: 84 = 5 + 79 = 11 + 73 = 13 + 71 = 17 + 67 = 23 + 61 = 31 + 53 = 37 + 47 = 41 + 43.
84 is the seventh tetrahedral number.
84 is 77 in base 11.
Messier 82 is a starburst galaxy in the constellation Ursa Major.
In both the National Basketball Association and the National Hockey League, each team plays an 82-game regular season schedule.
Source: Wikipedia; On-Line Encyclopedia of Integer Sequences
Image: NASA/JPL-Caltech/STScI/CXC/UofA/ESA/AURA/JHU
No comments:
Post a Comment