313978881911 has 2 divisors, whose sum is σ = 313978881912. Its totient is φ = 313978881910.

The previous prime is 313978881857. The next prime is 313978881941. The reversal of 313978881911 is 119188879313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313978881911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313978881941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156989440955 + 156989440956.

It is an arithmetic number, because the mean of its divisors is an integer number (156989440956).

Almost surely, 2^313978881911 is an apocalyptic number.

313978881911 is a deficient number, since it is larger than the sum of its proper divisors (1).

313978881911 is an equidigital number, since it uses as much as digits as its factorization.

313978881911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 59.

The spelling of 313978881911 in words is "three hundred thirteen billion, nine hundred seventy-eight million, eight hundred eighty-one thousand, nine hundred eleven".