311117959 has 2 divisors, whose sum is σ = 311117960. Its totient is φ = 311117958.

The previous prime is 311117927. The next prime is 311117977. The reversal of 311117959 is 959711113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311117959 - 2⁵ = 311117927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311117909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155558979 + 155558980.

It is an arithmetic number, because the mean of its divisors is an integer number (155558980).

Almost surely, 2^311117959 is an apocalyptic number.

311117959 is a deficient number, since it is larger than the sum of its proper divisors (1).

311117959 is an equidigital number, since it uses as much as digits as its factorization.

311117959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8505, while the sum is 37.

The square root of 311117959 is about 17638.5361920994. The cubic root of 311117959 is about 677.6025427229.

The spelling of 311117959 in words is "three hundred eleven million, one hundred seventeen thousand, nine hundred fifty-nine".