87 (Number)

87 is the natural number following 86 and preceding 88.
Cardinaleighty-seven
Ordinal87th (eighty-seventh)
Factorization 3 \cdot 29
Roman numeralLXXXVII
Binary01010111
Hexadecimal57

In mathematics

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

In science

In astronomy,
Messier object M87, a magnitude 11.0 elliptical galaxy in the constellation Virgo, also known as the Virgo A Galaxy
The New General Catalogue object NGC 87, a galaxy in the constellation Phoenix, a member of Robert's Quartet
The Saros number of the solar eclipse series which began on -76 February 3 and ended on 1222 April 13. The duration of Saros series 87 was 1298.1 years, and it contained 73 solar eclipses.
The Saros number of the lunar eclipse series which began on 9 July 25 and ended on 1325 September 23. The duration of Saros series 87 was 1316.2 years, and it contained 74 lunar eclipses.

In other fields

Eighty-seven is also:

 

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