317392991 has 8 divisors (see below), whose sum is σ = 323736480. Its totient is φ = 311062752.

The previous prime is 317392987. The next prime is 317393033. The reversal of 317392991 is 199293713.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 317392991 - 2² = 317392987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317392951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55190 + ... + 60668.

It is an arithmetic number, because the mean of its divisors is an integer number (40467060).

Almost surely, 2^317392991 is an apocalyptic number.

317392991 is a deficient number, since it is larger than the sum of its proper divisors (6343489).

317392991 is a wasteful number, since it uses less digits than its factorization.

317392991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6625.

The product of its digits is 91854, while the sum is 44.

The square root of 317392991 is about 17815.5266832053. The cubic root of 317392991 is about 682.1278437277.

The spelling of 317392991 in words is "three hundred seventeen million, three hundred ninety-two thousand, nine hundred ninety-one".