313307491 has 4 divisors (see below), whose sum is σ = 358065712. Its totient is φ = 268549272.

The previous prime is 313307479. The next prime is 313307521. The reversal of 313307491 is 194703313.

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 313307491 - 2²⁵ = 279753059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313307431) 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, 22379100 + ... + 22379113.

It is an arithmetic number, because the mean of its divisors is an integer number (89516428).

Almost surely, 2^313307491 is an apocalyptic number.

313307491 is a deficient number, since it is larger than the sum of its proper divisors (44758221).

313307491 is an equidigital number, since it uses as much as digits as its factorization.

313307491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44758220.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 313307491 is about 17700.4940891490. The cubic root of 313307491 is about 679.1883995070.

The spelling of 313307491 in words is "three hundred thirteen million, three hundred seven thousand, four hundred ninety-one".