679593979 has 2 divisors, whose sum is σ = 679593980. Its totient is φ = 679593978.

The previous prime is 679593977. The next prime is 679594001. The reversal of 679593979 is 979395976.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679593979 - 2¹ = 679593977 is a prime.

Together with 679593977, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 679593979.

It is not a weakly prime, because it can be changed into another prime (679593977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339796989 + 339796990.

It is an arithmetic number, because the mean of its divisors is an integer number (339796990).

Almost surely, 2^679593979 is an apocalyptic number.

679593979 is a deficient number, since it is larger than the sum of its proper divisors (1).

679593979 is an equidigital number, since it uses as much as digits as its factorization.

679593979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28934010, while the sum is 64.

The square root of 679593979 is about 26069.0233610697. The cubic root of 679593979 is about 879.1908794701.

The spelling of 679593979 in words is "six hundred seventy-nine million, five hundred ninety-three thousand, nine hundred seventy-nine".