311718879 has 6 divisors (see below), whose sum is σ = 450260616. Its totient is φ = 207812580.

The previous prime is 311718871. The next prime is 311718937. The reversal of 311718879 is 978817113.

It is a happy number.

It is not a de Polignac number, because 311718879 - 2³ = 311718871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311718871) 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 5 ways as a sum of consecutive naturals, for example, 17317707 + ... + 17317724.

It is an arithmetic number, because the mean of its divisors is an integer number (75043436).

Almost surely, 2^311718879 is an apocalyptic number.

311718879 is a deficient number, since it is larger than the sum of its proper divisors (138541737).

311718879 is a wasteful number, since it uses less digits than its factorization.

311718879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34635437 (or 34635434 counting only the distinct ones).

The product of its digits is 84672, while the sum is 45.

The square root of 311718879 is about 17655.5622680219. The cubic root of 311718879 is about 678.0385221018.

The spelling of 311718879 in words is "three hundred eleven million, seven hundred eighteen thousand, eight hundred seventy-nine".