49 (number)

49 (forty-nine) is the natural number following 48 and preceding 50.

Forty-nine is the square of 7. It is a centered octagonal number, and a Somer pseudoprime based on 8.

It appears in the Padovan sequence, preceded by the terms 21, 28, 37 (it is the sum of the first two of these).

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.

Forty-nine is also:

The number of days and night Sidartha spent meditating as a holy man
The span between Jubilee years as ordained in the Holy Bible.
The number of strings on a harp and the number of keys on a celesta.
I-49 is the designation for a US interstate highway in Louisiana.
The code for international direct dial phone calls to Germany.
As in 49er, the moniker of those who participated in the 1849 California Gold Rush.
In the title of Thomas Pynchon's novel The Crying of Lot 49.
In the title of the movie Ladder 49.
The year AD 49, 49 BC, and 1949.
The title of a hit by the James Gang is "Funk #49."
The author of the webcomic The Ultimate Life, hosted at The Middle Ground.
Featured in the song title "49 Bye-Byes" in Crosby Stills and Nash's self-titled album.

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