6879320621 has 4 divisors (see below), whose sum is σ = 6886807200. Its totient is φ = 6871834044.

The previous prime is 6879320599. The next prime is 6879320629. The reversal of 6879320621 is 1260239786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6879320621 - 2²² = 6875126317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6879320629) 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, 3741911 + ... + 3743748.

It is an arithmetic number, because the mean of its divisors is an integer number (1721701800).

Almost surely, 2^6879320621 is an apocalyptic number.

It is an amenable number.

6879320621 is a deficient number, since it is larger than the sum of its proper divisors (7486579).

6879320621 is an equidigital number, since it uses as much as digits as its factorization.

6879320621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7486578.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 6879320621 is about 82941.6699916272. The cubic root of 6879320621 is about 1901.8744770570.

The spelling of 6879320621 in words is "six billion, eight hundred seventy-nine million, three hundred twenty thousand, six hundred twenty-one".