679395988 has 12 divisors (see below), whose sum is σ = 1240636320. Its totient is φ = 324928472.

The previous prime is 679395967. The next prime is 679396009. The reversal of 679395988 is 889593976.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (679395967) and next prime (679396009).

It is a super-2 number, since 2×679395988² = 923157817020992288, which contains 22 as substring.

It is a congruent number.

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, 3692278 + ... + 3692461.

It is an arithmetic number, because the mean of its divisors is an integer number (103386360).

Almost surely, 2^679395988 is an apocalyptic number.

It is an amenable number.

679395988 is a deficient number, since it is larger than the sum of its proper divisors (561240332).

679395988 is a wasteful number, since it uses less digits than its factorization.

679395988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7384766 (or 7384764 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 64.

The square root of 679395988 is about 26065.2256464432. The cubic root of 679395988 is about 879.1054908439.

The spelling of 679395988 in words is "six hundred seventy-nine million, three hundred ninety-five thousand, nine hundred eighty-eight".