311289979 has 32 divisors (see below), whose sum is σ = 422231040. Its totient is φ = 221616000.

The previous prime is 311289971. The next prime is 311289997. The reversal of 311289979 is 979982113.

It is a cyclic number.

It is not a de Polignac number, because 311289979 - 2³ = 311289971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311289971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99562 + ... + 102640.

It is an arithmetic number, because the mean of its divisors is an integer number (13194720).

Almost surely, 2^311289979 is an apocalyptic number.

311289979 is a deficient number, since it is larger than the sum of its proper divisors (110941061).

311289979 is a wasteful number, since it uses less digits than its factorization.

311289979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211.

The product of its digits is 244944, while the sum is 49.

The square root of 311289979 is about 17643.4117732371. The cubic root of 311289979 is about 677.7274039533.

The spelling of 311289979 in words is "three hundred eleven million, two hundred eighty-nine thousand, nine hundred seventy-nine".