13979235291 has 16 divisors (see below), whose sum is σ = 21307467264. Its totient is φ = 7985968704.

The previous prime is 13979235247. The next prime is 13979235299. The reversal of 13979235291 is 19253297931.

It is not a de Polignac number, because 13979235291 - 2¹⁰ = 13979234267 is a prime.

It is a super-2 number, since 2×13979235291² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13979235299) 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, 9250 + ... + 167463.

It is an arithmetic number, because the mean of its divisors is an integer number (1331716704).

Almost surely, 2^13979235291 is an apocalyptic number.

13979235291 is a deficient number, since it is larger than the sum of its proper divisors (7328231973).

13979235291 is a wasteful number, since it uses less digits than its factorization.

13979235291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180490.

The product of its digits is 918540, while the sum is 51.

The spelling of 13979235291 in words is "thirteen billion, nine hundred seventy-nine million, two hundred thirty-five thousand, two hundred ninety-one".