285

This number is a composite.

+ 285 of the 295 primes less than 100000 which are congruent to 23 (mod 120) are full period primes. [Yates]

+ The smallest number whose sum of distinct prime factors is an odd prime to the power of an odd prime: 285 = 3 * 5 * 19 and 3 + 5 + 19 = 27 = 3^3. [Post]

(There are 2 curios for this number that have not yet been approved by an editor.)

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