679938804 has 18 divisors (see below), whose sum is σ = 1718734290. Its totient is φ = 226646256.

The previous prime is 679938797. The next prime is 679938821. The reversal of 679938804 is 408839976.

It can be written as a sum of positive squares in only one way, i.e., 678706704 + 1232100 = 26052^2 + 1110^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9443559 + ... + 9443630.

Almost surely, 2^679938804 is an apocalyptic number.

It is an amenable number.

679938804 is an abundant number, since it is smaller than the sum of its proper divisors (1038795486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679938804 is a wasteful number, since it uses less digits than its factorization.

679938804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18887199 (or 18887194 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 679938804 is about 26075.6362146737. The cubic root of 679938804 is about 879.3395543865.

The spelling of 679938804 in words is "six hundred seventy-nine million, nine hundred thirty-eight thousand, eight hundred four".