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# 1553

This number is a prime.

The number of ways of seating nine people around a circular table so that no one sits next to any of his neighbors in a previous seating order. [Post]

The sum of the squares of the first nine odd non-composite numbers. [Silva]

The smallest prime which can be represented as a sum of two
squares of a prime and its reversal (23^{2}+32^{2}). [Poo Sung]

(There is one curio for this number that has not yet been approved by an editor.)

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