311939893 has 8 divisors (see below), whose sum is σ = 319213440. Its totient is φ = 304692960.

The previous prime is 311939861. The next prime is 311939897. The reversal of 311939893 is 398939113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311939893 - 2⁵ = 311939861 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 (311939897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18118 + ... + 30856.

It is an arithmetic number, because the mean of its divisors is an integer number (39901680).

Almost surely, 2^311939893 is an apocalyptic number.

It is an amenable number.

311939893 is a deficient number, since it is larger than the sum of its proper divisors (7273547).

311939893 is a wasteful number, since it uses less digits than its factorization.

311939893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13307.

The product of its digits is 157464, while the sum is 46.

The square root of 311939893 is about 17661.8202063094. The cubic root of 311939893 is about 678.1987312017.

The spelling of 311939893 in words is "three hundred eleven million, nine hundred thirty-nine thousand, eight hundred ninety-three".