315023987 has 2 divisors, whose sum is σ = 315023988. Its totient is φ = 315023986.

The previous prime is 315023983. The next prime is 315023993. The reversal of 315023987 is 789320513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315023987 - 2² = 315023983 is a prime.

It is a super-2 number, since 2×315023987² = 198480224770752338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 315023987.

It is not a weakly prime, because it can be changed into another prime (315023983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157511993 + 157511994.

It is an arithmetic number, because the mean of its divisors is an integer number (157511994).

Almost surely, 2^315023987 is an apocalyptic number.

315023987 is a deficient number, since it is larger than the sum of its proper divisors (1).

315023987 is an equidigital number, since it uses as much as digits as its factorization.

315023987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 315023987 is about 17748.9150936050. The cubic root of 315023987 is about 680.4264820308.

The spelling of 315023987 in words is "three hundred fifteen million, twenty-three thousand, nine hundred eighty-seven".