311979161 has 8 divisors (see below), whose sum is σ = 336860160. Its totient is φ = 287224272.

The previous prime is 311979149. The next prime is 311979163. The reversal of 311979161 is 161979113.

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 311979161 - 2⁶ = 311979097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311979163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26351 + ... + 36308.

It is an arithmetic number, because the mean of its divisors is an integer number (42107520).

Almost surely, 2^311979161 is an apocalyptic number.

It is an amenable number.

311979161 is a deficient number, since it is larger than the sum of its proper divisors (24880999).

311979161 is a wasteful number, since it uses less digits than its factorization.

311979161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63055.

The product of its digits is 10206, while the sum is 38.

The square root of 311979161 is about 17662.9318347776. The cubic root of 311979161 is about 678.2271879557.

The spelling of 311979161 in words is "three hundred eleven million, nine hundred seventy-nine thousand, one hundred sixty-one".