318647089 has 2 divisors, whose sum is σ = 318647090. Its totient is φ = 318647088.

The previous prime is 318647051. The next prime is 318647093. The reversal of 318647089 is 980746813.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276656689 + 41990400 = 16633^2 + 6480^2 .

It is a cyclic number.

It is not a de Polignac number, because 318647089 - 2²⁷ = 184429361 is a prime.

It is not a weakly prime, because it can be changed into another prime (318647789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159323544 + 159323545.

It is an arithmetic number, because the mean of its divisors is an integer number (159323545).

Almost surely, 2^318647089 is an apocalyptic number.

It is an amenable number.

318647089 is a deficient number, since it is larger than the sum of its proper divisors (1).

318647089 is an equidigital number, since it uses as much as digits as its factorization.

318647089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 318647089 is about 17850.6887542190. The cubic root of 318647089 is about 683.0250814853.

The spelling of 318647089 in words is "three hundred eighteen million, six hundred forty-seven thousand, eighty-nine".