919

This number is a prime.

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+ A palindromic prime containing nineteen letters in its English name "nine hundred nineteen." Note that 9 + 1 + 9 equals nineteen and you get nineteen in either direction (left or right) from the center. [Post]

+ This prime is the 18th centered hexagonal number. Note that we can use the digits of 919 to write 18 = (9 * 1) + 9 = 9 + (1 * 9). [Post]

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