It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 923 = 13 ⋅71.
It is a cyclic number.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is a Curzon number.
It is a plaindrome in base 11, base 12, base 15 and base 16.
It is a nialpdrome in base 7 and base 8.
It is an amenable number.
329 is an equidigital number, since it uses as much as digits as its factorization.
329 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 54.
The square root of 329 is about 18.1383571472. The cubic root of 329 is about 6.9034359419.
Adding to 329 its sum of digits (14), we get a palindrome (343).
Adding to 329 its product of digits (54), we get a palindrome (383).
Multiplying 329 by its product of digits (54), we get a triangular number (17766 = T188).