679449872 has 10 divisors (see below), whose sum is σ = 1316434158. Its totient is φ = 339724928.

The previous prime is 679449821. The next prime is 679449913. The reversal of 679449872 is 278944976.

It can be written as a sum of positive squares in only one way, i.e., 395055376 + 284394496 = 19876^2 + 16864^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21232793 + ... + 21232824.

Almost surely, 2^679449872 is an apocalyptic number.

It is an amenable number.

679449872 is a deficient number, since it is larger than the sum of its proper divisors (636984286).

679449872 is a wasteful number, since it uses less digits than its factorization.

679449872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42465625 (or 42465619 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 56.

The square root of 679449872 is about 26066.2592636535. The cubic root of 679449872 is about 879.1287313246.

The spelling of 679449872 in words is "six hundred seventy-nine million, four hundred forty-nine thousand, eight hundred seventy-two".