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49 (number)

 

49 (number)

49 is the natural number following 48 and preceding 50.

Cardinal forty-nine
Ordinal49th (forty-ninth)
Factorization
Roman numeralXLIX
Binary0110001
Hexadecimal31

In mathematics

Forty-nine is a square number, a centered octagonal number, and a Somer pseudoprime based on 8.

In science

  • The atomic number of indium

    In astronomy,

    Messier object M49, a magnitude 10.0 galaxy in the constellation Virgo.

    The New General Catalogue object NGC 49, a spiral galaxy in the constellation Cetus.

    The Saros number of the solar eclipse series which began on -1248 February 22 and ended on 32 March 29. The duration of Saros series 49 was 1280.1 years, and it contained 72 solar eclipses.

    The Saros number of the lunar eclipse series which began on -1217 June 21 and ended on 81 August 8. The duration of Saros series 49 was 1298.1 years, and it contained 73 lunar eclipses.

    In other fields

    Forty-nine is also:



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