51968979 has 16 divisors (see below), whose sum is σ = 79073440. Its totient is φ = 33708960.

The previous prime is 51968977. The next prime is 51968993. The reversal of 51968979 is 97986915.

It is not a de Polignac number, because 51968979 - 2¹ = 51968977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51968977) 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, 25012 + ... + 27009.

It is an arithmetic number, because the mean of its divisors is an integer number (4942090).

Almost surely, 2^51968979 is an apocalyptic number.

51968979 is a deficient number, since it is larger than the sum of its proper divisors (27104461).

51968979 is a wasteful number, since it uses less digits than its factorization.

51968979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52067 (or 52061 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 51968979 is about 7208.9513106970. The cubic root of 51968979 is about 373.1768789762.

The spelling of 51968979 in words is "fifty-one million, nine hundred sixty-eight thousand, nine hundred seventy-nine".