6979 has 4 divisors (see below), whose sum is σ = 7984. Its totient is φ = 5976.

The previous prime is 6977. The next prime is 6983. The reversal of 6979 is 9796.

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 6979 - 2¹ = 6977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6979.

It is not an unprimeable number, because it can be changed into a prime (6971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492 + ... + 505.

It is an arithmetic number, because the mean of its divisors is an integer number (1996).

6979 is a deficient number, since it is larger than the sum of its proper divisors (1005).

6979 is an equidigital number, since it uses as much as digits as its factorization.

6979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004.

The product of its digits is 3402, while the sum is 31.

The square root of 6979 is about 83.5404093837. The cubic root of 6979 is about 19.1101633546.

The spelling of 6979 in words is "six thousand, nine hundred seventy-nine".