323

323 = 17 x 19.

323 is the smallest palindrome that is the product of a pair of twin primes.

323 is the smallest palindrome that is not divisible by any of its digits.

323 is the 8th Motzkin number. These numbers enumerate various combinatorial objects.

323 Brucia was the first asteroid to be discovered by the use of astrophotography.

Source: Number Gossip