315391877 has 2 divisors, whose sum is σ = 315391878. Its totient is φ = 315391876.

The previous prime is 315391831. The next prime is 315391883. The reversal of 315391877 is 778193513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166771396 + 148620481 = 12914^2 + 12191^2 .

It is a cyclic number.

It is not a de Polignac number, because 315391877 - 2¹² = 315387781 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315391807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157695938 + 157695939.

It is an arithmetic number, because the mean of its divisors is an integer number (157695939).

Almost surely, 2^315391877 is an apocalyptic number.

It is an amenable number.

315391877 is a deficient number, since it is larger than the sum of its proper divisors (1).

315391877 is an equidigital number, since it uses as much as digits as its factorization.

315391877 is an evil number, because the sum of its binary digits is even.

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

The square root of 315391877 is about 17759.2758016761. The cubic root of 315391877 is about 680.6912499306.

The spelling of 315391877 in words is "three hundred fifteen million, three hundred ninety-one thousand, eight hundred seventy-seven".