6911979 has 16 divisors (see below), whose sum is σ = 9811872. Its totient is φ = 4313088.

The previous prime is 6911969. The next prime is 6911987. The reversal of 6911979 is 9791196.

It is a de Polignac number, because none of the positive numbers 2^k-6911979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6911979.

It is not an unprimeable number, because it can be changed into a prime (6911939) 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, 15747 + ... + 16179.

It is an arithmetic number, because the mean of its divisors is an integer number (613242).

Almost surely, 2^6911979 is an apocalyptic number.

6911979 is a deficient number, since it is larger than the sum of its proper divisors (2899893).

6911979 is a wasteful number, since it uses less digits than its factorization.

6911979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766.

The product of its digits is 30618, while the sum is 42.

The square root of 6911979 is about 2629.0642822114. The cubic root of 6911979 is about 190.4879333227.

The spelling of 6911979 in words is "six million, nine hundred eleven thousand, nine hundred seventy-nine".