13979115 has 16 divisors (see below), whose sum is σ = 24852000. Its totient is φ = 7455456.

The previous prime is 13979113. The next prime is 13979143. The reversal of 13979115 is 51197931.

It is not a de Polignac number, because 13979115 - 2¹ = 13979113 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13979115.

It is not an unprimeable number, because it can be changed into a prime (13979111) 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, 51640 + ... + 51909.

It is an arithmetic number, because the mean of its divisors is an integer number (1553250).

Almost surely, 2^13979115 is an apocalyptic number.

13979115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13979115 is a deficient number, since it is larger than the sum of its proper divisors (10872885).

13979115 is a wasteful number, since it uses less digits than its factorization.

13979115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103563 (or 103557 counting only the distinct ones).

The product of its digits is 8505, while the sum is 36.

The square root of 13979115 is about 3738.8654696311. The cubic root of 13979115 is about 240.8943195793.

The spelling of 13979115 in words is "thirteen million, nine hundred seventy-nine thousand, one hundred fifteen".