315318977 has 2 divisors, whose sum is σ = 315318978. Its totient is φ = 315318976.

The previous prime is 315318973. The next prime is 315318989. The reversal of 315318977 is 779813513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203889841 + 111429136 = 14279^2 + 10556^2 .

It is an emirp because it is prime and its reverse (779813513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315318977 - 2² = 315318973 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315318973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157659488 + 157659489.

It is an arithmetic number, because the mean of its divisors is an integer number (157659489).

Almost surely, 2^315318977 is an apocalyptic number.

It is an amenable number.

315318977 is a deficient number, since it is larger than the sum of its proper divisors (1).

315318977 is an equidigital number, since it uses as much as digits as its factorization.

315318977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 44.

The square root of 315318977 is about 17757.2232345038. The cubic root of 315318977 is about 680.6388006662.

The spelling of 315318977 in words is "three hundred fifteen million, three hundred eighteen thousand, nine hundred seventy-seven".