318672989 has 2 divisors, whose sum is σ = 318672990. Its totient is φ = 318672988.

The previous prime is 318672979. The next prime is 318673001. The reversal of 318672989 is 989276813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300328900 + 18344089 = 17330^2 + 4283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318672989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318672989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318672919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159336494 + 159336495.

It is an arithmetic number, because the mean of its divisors is an integer number (159336495).

Almost surely, 2^318672989 is an apocalyptic number.

It is an amenable number.

318672989 is a deficient number, since it is larger than the sum of its proper divisors (1).

318672989 is an equidigital number, since it uses as much as digits as its factorization.

318672989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 318672989 is about 17851.4142016816. The cubic root of 318672989 is about 683.0435866707.

The spelling of 318672989 in words is "three hundred eighteen million, six hundred seventy-two thousand, nine hundred eighty-nine".