6879979 has 4 divisors (see below), whose sum is σ = 6892600. Its totient is φ = 6867360.

The previous prime is 6879973. The next prime is 6879997. The reversal of 6879979 is 9799786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6879979 - 2⁵ = 6879947 is a prime.

It is a super-2 number, since 2×6879979² = 94668222080882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6879973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5454 + ... + 6595.

It is an arithmetic number, because the mean of its divisors is an integer number (1723150).

Almost surely, 2^6879979 is an apocalyptic number.

6879979 is a deficient number, since it is larger than the sum of its proper divisors (12621).

6879979 is a wasteful number, since it uses less digits than its factorization.

6879979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12620.

The product of its digits is 1714608, while the sum is 55.

The square root of 6879979 is about 2622.9714066303. The cubic root of 6879979 is about 190.1935147499.

The spelling of 6879979 in words is "six million, eight hundred seventy-nine thousand, nine hundred seventy-nine".