13940597979 has 96 divisors (see below), whose sum is σ = 26519420928. Its totient is φ = 6844824000.

The previous prime is 13940597969. The next prime is 13940598031. The reversal of 13940597979 is 97979504931.

13940597979 is a `hidden beast` number, since 1 + 39 + 4 + 0 + 597 + 9 + 7 + 9 = 666.

It is not a de Polignac number, because 13940597979 - 2¹³ = 13940589787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (13940597969) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 916224 + ... + 931314.

It is an arithmetic number, because the mean of its divisors is an integer number (276243968).

Almost surely, 2^13940597979 is an apocalyptic number.

13940597979 is a deficient number, since it is larger than the sum of its proper divisors (12578822949).

13940597979 is a wasteful number, since it uses less digits than its factorization.

13940597979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15189 (or 15186 counting only the distinct ones).

The product of its (nonzero) digits is 19289340, while the sum is 63.

The spelling of 13940597979 in words is "thirteen billion, nine hundred forty million, five hundred ninety-seven thousand, nine hundred seventy-nine".