Wednesday, November 16, 2011

309

309 = 3 x 103.

309 is a centered hendecagonal number.

309 is the smallest number whose fifth power (3095 = 2817036000549) is pandigital (contains every digit from 0 to 9 at least once).

3093 + 3090 + 3099 is a prime, with prime digital length.

309 is 373 in base 9. It is 621 in base 7 and 261 in base 11.

309 is a telephone area code serving the state of Illinois.

Source: Number Gossip

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