13979236605 has 32 divisors (see below), whose sum is σ = 23555136000. Its totient is φ = 7059845952.

The previous prime is 13979236603. The next prime is 13979236619. The reversal of 13979236605 is 50663297931.

It is a happy number.

It is not a de Polignac number, because 13979236605 - 2¹ = 13979236603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13979236603) 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, 658446 + ... + 679344.

It is an arithmetic number, because the mean of its divisors is an integer number (736098000).

Almost surely, 2^13979236605 is an apocalyptic number.

13979236605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13979236605 is a deficient number, since it is larger than the sum of its proper divisors (9575899395).

13979236605 is a wasteful number, since it uses less digits than its factorization.

13979236605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23273.

The product of its (nonzero) digits is 1837080, while the sum is 51.

The spelling of 13979236605 in words is "thirteen billion, nine hundred seventy-nine million, two hundred thirty-six thousand, six hundred five".