87 (number)

List of numbers — Integers << 80 81 82 83 84 85 86 87 88 89 >>
Cardinal	eighty-seven
Ordinal	87th (eighty-seventh)
Factorization
Roman numeral	LXXXVII
Binary	01010111
Hexadecimal	57

Eighty-seven is the sum of the squares of the first four primes.

• the atomic number of francium (Fr)
• the number of years between the signing of the U.S. Declaration of Independence and the Battle of Gettysburg, immortalized in Abraham Lincoln's Gettysburg Address: Fourscore and seven years ago, our forefathers...
• the model number of Junkers Ju 87
• the Messier number of M87, a giant elliptical galaxy.
• the number of the French department Haute-Vienne
• the designation of Interstate 87, a freeway in New York; the European route E87 from Tulcea to Antalya
• the code for international direct dial phone calls to Inmarsat and other services
• the 87 photographic filter blocks visible light allowing only infrared light to pass
• The year AD 87, 87 BC, or 1987.