317392993 has 4 divisors (see below), whose sum is σ = 325971220. Its totient is φ = 308814768.

The previous prime is 317392987. The next prime is 317393033. The reversal of 317392993 is 399293713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 201980944 + 115412049 = 14212^2 + 10743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317392993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (317392963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4289058 + ... + 4289131.

It is an arithmetic number, because the mean of its divisors is an integer number (81492805).

Almost surely, 2^317392993 is an apocalyptic number.

It is an amenable number.

317392993 is a deficient number, since it is larger than the sum of its proper divisors (8578227).

317392993 is an equidigital number, since it uses as much as digits as its factorization.

317392993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8578226.

The product of its digits is 275562, while the sum is 46.

The square root of 317392993 is about 17815.5267393361. The cubic root of 317392993 is about 682.1278451605.

The spelling of 317392993 in words is "three hundred seventeen million, three hundred ninety-two thousand, nine hundred ninety-three".