679845904 has 20 divisors (see below), whose sum is σ = 1317711420. Its totient is φ = 339791360.

The previous prime is 679845899. The next prime is 679845911. The reversal of 679845904 is 409548976.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 578883600 + 100962304 = 24060^2 + 10048^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44724 + ... + 57964.

It is an arithmetic number, because the mean of its divisors is an integer number (65885571).

Almost surely, 2^679845904 is an apocalyptic number.

It is an amenable number.

679845904 is a deficient number, since it is larger than the sum of its proper divisors (637865516).

679845904 is a wasteful number, since it uses less digits than its factorization.

679845904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16458 (or 16452 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 679845904 is about 26073.8547974786. The cubic root of 679845904 is about 879.2995045247.

The spelling of 679845904 in words is "six hundred seventy-nine million, eight hundred forty-five thousand, nine hundred four".