318560987 has 2 divisors, whose sum is σ = 318560988. Its totient is φ = 318560986.

The previous prime is 318560959. The next prime is 318560999. The reversal of 318560987 is 789065813.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 318560987 - 2⁸ = 318560731 is a prime.

It is a super-2 number, since 2×318560987² = 202962204876828338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (318560927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159280493 + 159280494.

It is an arithmetic number, because the mean of its divisors is an integer number (159280494).

Almost surely, 2^318560987 is an apocalyptic number.

318560987 is a deficient number, since it is larger than the sum of its proper divisors (1).

318560987 is an equidigital number, since it uses as much as digits as its factorization.

318560987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 318560987 is about 17848.2768636079. The cubic root of 318560987 is about 682.9635556098.

The spelling of 318560987 in words is "three hundred eighteen million, five hundred sixty thousand, nine hundred eighty-seven".