313091 has 4 divisors (see below), whose sum is σ = 317832. Its totient is φ = 308352.

The previous prime is 313087. The next prime is 313109. The reversal of 313091 is 190313.

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 313091 - 2² = 313087 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 313091.

It is not an unprimeable number, because it can be changed into a prime (313031) 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, 2270 + ... + 2403.

It is an arithmetic number, because the mean of its divisors is an integer number (79458).

2³¹³⁰⁹¹ is an apocalyptic number.

313091 is a deficient number, since it is larger than the sum of its proper divisors (4741).

313091 is an equidigital number, since it uses as much as digits as its factorization.

313091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4740.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 313091 is about 559.5453511557. The cubic root of 313091 is about 67.9031926968.

The spelling of 313091 in words is "three hundred thirteen thousand, ninety-one".