315724009 has 2 divisors, whose sum is σ = 315724010. Its totient is φ = 315724008.

The previous prime is 315723977. The next prime is 315724027. The reversal of 315724009 is 900427513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282408025 + 33315984 = 16805^2 + 5772^2 .

It is a cyclic number.

It is not a de Polignac number, because 315724009 - 2⁵ = 315723977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315724109) 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, 157862004 + 157862005.

It is an arithmetic number, because the mean of its divisors is an integer number (157862005).

Almost surely, 2^315724009 is an apocalyptic number.

It is an amenable number.

315724009 is a deficient number, since it is larger than the sum of its proper divisors (1).

315724009 is an equidigital number, since it uses as much as digits as its factorization.

315724009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 315724009 is about 17768.6242855208. The cubic root of 315724009 is about 680.9301062544.

The spelling of 315724009 in words is "three hundred fifteen million, seven hundred twenty-four thousand, nine".