316111391 has 2 divisors, whose sum is σ = 316111392. Its totient is φ = 316111390.

The previous prime is 316111373. The next prime is 316111409. The reversal of 316111391 is 193111613.

It is a balanced prime because it is at equal distance from previous prime (316111373) and next prime (316111409).

It is a cyclic number.

It is not a de Polignac number, because 316111391 - 2²² = 311917087 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 316111391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316111291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158055695 + 158055696.

It is an arithmetic number, because the mean of its divisors is an integer number (158055696).

Almost surely, 2^316111391 is an apocalyptic number.

316111391 is a deficient number, since it is larger than the sum of its proper divisors (1).

316111391 is an equidigital number, since it uses as much as digits as its factorization.

316111391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 26.

The square root of 316111391 is about 17779.5216752307. The cubic root of 316111391 is about 681.2084846794.

The spelling of 316111391 in words is "three hundred sixteen million, one hundred eleven thousand, three hundred ninety-one".