311972863 has 8 divisors (see below), whose sum is σ = 320869568. Its totient is φ = 303100704.

The previous prime is 311972839. The next prime is 311972879. The reversal of 311972863 is 368279113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311972863 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 (311972263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21370 + ... + 32872.

It is an arithmetic number, because the mean of its divisors is an integer number (40108696).

Almost surely, 2^311972863 is an apocalyptic number.

311972863 is a deficient number, since it is larger than the sum of its proper divisors (8896705).

311972863 is a wasteful number, since it uses less digits than its factorization.

311972863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12273.

The product of its digits is 54432, while the sum is 40.

The square root of 311972863 is about 17662.7535509048. The cubic root of 311972863 is about 678.2226240787. Note that the first 3 decimals are identical.

The spelling of 311972863 in words is "three hundred eleven million, nine hundred seventy-two thousand, eight hundred sixty-three".