311879 has 4 divisors (see below), whose sum is σ = 319176. Its totient is φ = 304584.

The previous prime is 311869. The next prime is 311881. The reversal of 311879 is 978113.

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 311879 - 2¹⁶ = 246343 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 (311869) 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, 3584 + ... + 3669.

It is an arithmetic number, because the mean of its divisors is an integer number (79794).

2³¹¹⁸⁷⁹ is an apocalyptic number.

311879 is a deficient number, since it is larger than the sum of its proper divisors (7297).

311879 is an equidigital number, since it uses as much as digits as its factorization.

311879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7296.

The product of its digits is 1512, while the sum is 29.

The square root of 311879 is about 558.4612788726. The cubic root of 311879 is about 67.8154598508.

The spelling of 311879 in words is "three hundred eleven thousand, eight hundred seventy-nine".