6679979 has 2 divisors, whose sum is σ = 6679980. Its totient is φ = 6679978.

The previous prime is 6679957. The next prime is 6679993. The reversal of 6679979 is 9799766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6679979 - 2⁸ = 6679723 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6679979.

It is not a weakly prime, because it can be changed into another prime (6679919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3339989 + 3339990.

It is an arithmetic number, because the mean of its divisors is an integer number (3339990).

Almost surely, 2^6679979 is an apocalyptic number.

6679979 is a deficient number, since it is larger than the sum of its proper divisors (1).

6679979 is an equidigital number, since it uses as much as digits as its factorization.

6679979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1285956, while the sum is 53.

The square root of 6679979 is about 2584.5655340889. The cubic root of 6679979 is about 188.3323963372.

The spelling of 6679979 in words is "six million, six hundred seventy-nine thousand, nine hundred seventy-nine".