Wednesday, April 11, 2012

4646

4646 = 2 x 23 x 101.

The digits of 4646 are all semiprimes (A111494 and A107665).

54646 - 46465 is a prime (A117705).

4646 and the 4646th prime (44699) contain only the digits 4, 6, and 9 (A107624).

4646 is the number of connected graphs on eight nodes with clique number 4 (A126746).


Source: On-Line Encyclopedia of Integer Sequences

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