318989725 has 12 divisors (see below), whose sum is σ = 396576180. Its totient is φ = 254528000.

The previous prime is 318989687. The next prime is 318989743. The reversal of 318989725 is 527989813.

It can be written as a sum of positive squares in 6 ways, for example, as 66243321 + 252746404 = 8139^2 + 15898^2 .

It is a de Polignac number, because none of the positive numbers 2^k-318989725 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6676 + ... + 26125.

It is an arithmetic number, because the mean of its divisors is an integer number (33048015).

Almost surely, 2^318989725 is an apocalyptic number.

It is an amenable number.

318989725 is a deficient number, since it is larger than the sum of its proper divisors (77586455).

318989725 is a wasteful number, since it uses less digits than its factorization.

318989725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33200 (or 33195 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 52.

The square root of 318989725 is about 17860.2834523979. The cubic root of 318989725 is about 683.2698090198.

The spelling of 318989725 in words is "three hundred eighteen million, nine hundred eighty-nine thousand, seven hundred twenty-five".