6979905 has 32 divisors (see below), whose sum is σ = 12528000. Its totient is φ = 3686976.

The previous prime is 6979901. The next prime is 6979913. The reversal of 6979905 is 5099796.

It is not a de Polignac number, because 6979905 - 2² = 6979901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

6979905 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6979901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19942 + ... + 20288.

It is an arithmetic number, because the mean of its divisors is an integer number (391500).

Almost surely, 2^6979905 is an apocalyptic number.

It is an amenable number.

6979905 is a deficient number, since it is larger than the sum of its proper divisors (5548095).

6979905 is a wasteful number, since it uses less digits than its factorization.

6979905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 6979905 is about 2641.9509836483. The cubic root of 6979905 is about 191.1098935408.

The spelling of 6979905 in words is "six million, nine hundred seventy-nine thousand, nine hundred five".