315527987 has 2 divisors, whose sum is σ = 315527988. Its totient is φ = 315527986.

The previous prime is 315527981. The next prime is 315527999. The reversal of 315527987 is 789725513.

It is a weak prime.

It is an emirp because it is prime and its reverse (789725513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315527987 is a prime.

It is not a weakly prime, because it can be changed into another prime (315527981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157763993 + 157763994.

It is an arithmetic number, because the mean of its divisors is an integer number (157763994).

Almost surely, 2^315527987 is an apocalyptic number.

315527987 is a deficient number, since it is larger than the sum of its proper divisors (1).

315527987 is an equidigital number, since it uses as much as digits as its factorization.

315527987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 47.

The square root of 315527987 is about 17763.1074702598. The cubic root of 315527987 is about 680.7891551803.

The spelling of 315527987 in words is "three hundred fifteen million, five hundred twenty-seven thousand, nine hundred eighty-seven".