679958984 has 8 divisors (see below), whose sum is σ = 1274923110. Its totient is φ = 339979488.

The previous prime is 679958941. The next prime is 679958987. The reversal of 679958984 is 489859976.

It can be written as a sum of positive squares in only one way, i.e., 671950084 + 8008900 = 25922^2 + 2830^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 679958984.

It is not an unprimeable number, because it can be changed into a prime (679958987) by changing a digit.

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 as a sum of consecutive naturals, namely, 42497429 + ... + 42497444.

Almost surely, 2^679958984 is an apocalyptic number.

It is an amenable number.

679958984 is a deficient number, since it is larger than the sum of its proper divisors (594964126).

679958984 is a wasteful number, since it uses less digits than its factorization.

679958984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84994879 (or 84994875 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 65.

The square root of 679958984 is about 26076.0231630515. The cubic root of 679958984 is about 879.3482536481.

The spelling of 679958984 in words is "six hundred seventy-nine million, nine hundred fifty-eight thousand, nine hundred eighty-four".