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Revision as of 19:53, 28 September 2004

49 is the natural number following 48 and preceding 50.

Template:Numbers 40s
Cardinal	forty-nine
Ordinal	49th (forty-ninth)
Factorization	$7^{2}\,\!$
Roman numeral	XLIX
Binary	0110001
Hexadecimal	31

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

It is also:

The atomic number of indium.
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 gold rush.
The year AD 49, 49 BC, and 1949.