315619873 has 2 divisors, whose sum is σ = 315619874. Its totient is φ = 315619872.

The previous prime is 315619819. The next prime is 315619877. The reversal of 315619873 is 378916513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305270784 + 10349089 = 17472^2 + 3217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315619873 is a prime.

It is a super-2 number, since 2×315619873² = 199231808465072258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315619877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157809936 + 157809937.

It is an arithmetic number, because the mean of its divisors is an integer number (157809937).

Almost surely, 2^315619873 is an apocalyptic number.

It is an amenable number.

315619873 is a deficient number, since it is larger than the sum of its proper divisors (1).

315619873 is an equidigital number, since it uses as much as digits as its factorization.

315619873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 315619873 is about 17765.6937100694. The cubic root of 315619873 is about 680.8552337571.

The spelling of 315619873 in words is "three hundred fifteen million, six hundred nineteen thousand, eight hundred seventy-three".