679608931 has 4 divisors (see below), whose sum is σ = 679983552. Its totient is φ = 679234312.

The previous prime is 679608893. The next prime is 679608953. The reversal of 679608931 is 139806976.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679608931 is a prime.

It is a super-2 number, since 2×679608931² = 923736598189925522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679608961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184576 + ... + 188221.

It is an arithmetic number, because the mean of its divisors is an integer number (169995888).

Almost surely, 2^679608931 is an apocalyptic number.

679608931 is a deficient number, since it is larger than the sum of its proper divisors (374621).

679608931 is a wasteful number, since it uses less digits than its factorization.

679608931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374620.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 679608931 is about 26069.3101366338. The cubic root of 679608931 is about 879.1973272247.

The spelling of 679608931 in words is "six hundred seventy-nine million, six hundred eight thousand, nine hundred thirty-one".