311913 has 12 divisors (see below), whose sum is σ = 515008. Its totient is φ = 178200.

The previous prime is 311897. The next prime is 311951. The reversal of 311913 is 319113.

It is not a de Polignac number, because 311913 - 2⁴ = 311897 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2413 + ... + 2538.

2³¹¹⁹¹³ is an apocalyptic number.

It is an amenable number.

311913 is a deficient number, since it is larger than the sum of its proper divisors (203095).

311913 is a wasteful number, since it uses less digits than its factorization.

311913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4964 (or 4961 counting only the distinct ones).

The product of its digits is 81, while the sum is 18.

The square root of 311913 is about 558.4917188285. The cubic root of 311913 is about 67.8179240991.

The spelling of 311913 in words is "three hundred eleven thousand, nine hundred thirteen".