317921329 has 8 divisors (see below), whose sum is σ = 349691040. Its totient is φ = 289018180.

The previous prime is 317921327. The next prime is 317921371. The reversal of 317921329 is 923129713.

It is a happy number.

It is not a de Polignac number, because 317921329 - 2¹ = 317921327 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (317921321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118099 + ... + 120760.

It is an arithmetic number, because the mean of its divisors is an integer number (43711380).

Almost surely, 2^317921329 is an apocalyptic number.

It is an amenable number.

317921329 is a deficient number, since it is larger than the sum of its proper divisors (31769711).

317921329 is an equidigital number, since it uses as much as digits as its factorization.

317921329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238892 (or 238870 counting only the distinct ones).

The product of its digits is 20412, while the sum is 37.

The square root of 317921329 is about 17830.3485383769. The cubic root of 317921329 is about 682.5061279399.

The spelling of 317921329 in words is "three hundred seventeen million, nine hundred twenty-one thousand, three hundred twenty-nine".