315508969 has 2 divisors, whose sum is σ = 315508970. Its totient is φ = 315508968.

The previous prime is 315508957. The next prime is 315508987. The reversal of 315508969 is 969805513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200590569 + 114918400 = 14163^2 + 10720^2 .

It is a cyclic number.

It is not a de Polignac number, because 315508969 - 2¹³ = 315500777 is a prime.

It is a super-2 number, since 2×315508969² = 199091819038885922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315508939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157754484 + 157754485.

It is an arithmetic number, because the mean of its divisors is an integer number (157754485).

Almost surely, 2^315508969 is an apocalyptic number.

It is an amenable number.

315508969 is a deficient number, since it is larger than the sum of its proper divisors (1).

315508969 is an equidigital number, since it uses as much as digits as its factorization.

315508969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 315508969 is about 17762.5721391920. The cubic root of 315508969 is about 680.7754770399.

The spelling of 315508969 in words is "three hundred fifteen million, five hundred eight thousand, nine hundred sixty-nine".