318372649 has 9 divisors (see below), whose sum is σ = 370497207. Its totient is φ = 272783784.

The previous prime is 318372629. The next prime is 318372653. The reversal of 318372649 is 946273813.

The square root of 318372649 is 17843.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 294362649 + 24010000 = 17157^2 + 4900^2 .

It is not a de Polignac number, because 318372649 - 2¹⁵ = 318339881 is a prime.

It is a super-2 number, since 2×318372649² = 202722287262554402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318372629) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 123627 + ... + 126175.

Almost surely, 2^318372649 is an apocalyptic number.

318372649 is the 17843-rd square number.

318372649 is the 8922-nd centered octagonal number.

It is an amenable number.

318372649 is a deficient number, since it is larger than the sum of its proper divisors (52124558).

318372649 is an frugal number, since it uses more digits than its factorization.

318372649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112 (or 2556 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The cubic root of 318372649 is about 682.8289363347.

The spelling of 318372649 in words is "three hundred eighteen million, three hundred seventy-two thousand, six hundred forty-nine".