Tuesday, January 11, 2011

109

109 is a prime number.

109 has a representation as a sum of two squares: 109 = 32 + 102.

107 and 109 form a twin prime pair.

109 is the hypotenuse of a primitive Pythagorean triple: 1092 = 602 + 912.


109 is the smallest number that contains more digits than its square: 1092 = 11881.

109 is the smallest number that is palindromic in bases 5 (414) and 9 (131).

109 is the atomic number of the element meitnerium.

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