317112391 has 4 divisors (see below), whose sum is σ = 317394400. Its totient is φ = 316830384.

The previous prime is 317112377. The next prime is 317112403. The reversal of 317112391 is 193211713.

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

It is a cyclic number.

It is not a de Polignac number, because 317112391 - 2¹⁷ = 316981319 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 (317112331) 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 3 ways as a sum of consecutive naturals, for example, 139311 + ... + 141568.

It is an arithmetic number, because the mean of its divisors is an integer number (79348600).

Almost surely, 2^317112391 is an apocalyptic number.

317112391 is a deficient number, since it is larger than the sum of its proper divisors (282009).

317112391 is a wasteful number, since it uses less digits than its factorization.

317112391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282008.

The product of its digits is 1134, while the sum is 28.

The square root of 317112391 is about 17807.6497887846. The cubic root of 317112391 is about 681.9267665020.

The spelling of 317112391 in words is "three hundred seventeen million, one hundred twelve thousand, three hundred ninety-one".