311957279 has 2 divisors, whose sum is σ = 311957280. Its totient is φ = 311957278.

The previous prime is 311957231. The next prime is 311957281. The reversal of 311957279 is 972759113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311957279 - 2¹² = 311953183 is a prime.

Together with 311957281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311957299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155978639 + 155978640.

It is an arithmetic number, because the mean of its divisors is an integer number (155978640).

Almost surely, 2^311957279 is an apocalyptic number.

311957279 is a deficient number, since it is larger than the sum of its proper divisors (1).

311957279 is an equidigital number, since it uses as much as digits as its factorization.

311957279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119070, while the sum is 44.

The square root of 311957279 is about 17662.3123910772. The cubic root of 311957279 is about 678.2113307915.

The spelling of 311957279 in words is "three hundred eleven million, nine hundred fifty-seven thousand, two hundred seventy-nine".