6816879 has 18 divisors (see below), whose sum is σ = 10234640. Its totient is φ = 4540212.

The previous prime is 6816871. The next prime is 6816889. The reversal of 6816879 is 9786186.

It is a happy number.

It is not a de Polignac number, because 6816879 - 2³ = 6816871 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 (6816871) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6042 + ... + 7080.

Almost surely, 2^6816879 is an apocalyptic number.

6816879 is a deficient number, since it is larger than the sum of its proper divisors (3417761).

6816879 is an frugal number, since it uses more digits than its factorization.

6816879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063 (or 1042 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 6816879 is about 2610.9153567284. The cubic root of 6816879 is about 189.6102722363.

The spelling of 6816879 in words is "six million, eight hundred sixteen thousand, eight hundred seventy-nine".