6855979 has 16 divisors (see below), whose sum is σ = 7973280. Its totient is φ = 5840640.

The previous prime is 6855971. The next prime is 6856009. The reversal of 6855979 is 9795586.

It is not a de Polignac number, because 6855979 - 2³ = 6855971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6855971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9789 + ... + 10465.

It is an arithmetic number, because the mean of its divisors is an integer number (498330).

Almost surely, 2^6855979 is an apocalyptic number.

6855979 is a deficient number, since it is larger than the sum of its proper divisors (1117301).

6855979 is a wasteful number, since it uses less digits than its factorization.

6855979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its digits is 680400, while the sum is 49.

The square root of 6855979 is about 2618.3924457575. The cubic root of 6855979 is about 189.9721011668.

The spelling of 6855979 in words is "six million, eight hundred fifty-five thousand, nine hundred seventy-nine".