6979221 has 12 divisors (see below), whose sum is σ = 10203648. Its totient is φ = 4596264.

The previous prime is 6979207. The next prime is 6979223. The reversal of 6979221 is 1229796.

It is not a de Polignac number, because 6979221 - 2⁹ = 6978709 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6979223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3925 + ... + 5418.

It is an arithmetic number, because the mean of its divisors is an integer number (850304).

Almost surely, 2^6979221 is an apocalyptic number.

It is an amenable number.

6979221 is a deficient number, since it is larger than the sum of its proper divisors (3224427).

6979221 is a wasteful number, since it uses less digits than its factorization.

6979221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9432 (or 9429 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 6979221 is about 2641.8215306867. The cubic root of 6979221 is about 191.1036506938.

The spelling of 6979221 in words is "six million, nine hundred seventy-nine thousand, two hundred twenty-one".