13979291 has 2 divisors, whose sum is σ = 13979292. Its totient is φ = 13979290.

The previous prime is 13979279. The next prime is 13979297. The reversal of 13979291 is 19297931.

It is a strong prime.

It is an emirp because it is prime and its reverse (19297931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13979291 - 2²² = 9784987 is a prime.

It is a super-3 number, since 3×13979291³ (a number of 22 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13979297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6989645 + 6989646.

It is an arithmetic number, because the mean of its divisors is an integer number (6989646).

Almost surely, 2^13979291 is an apocalyptic number.

13979291 is a deficient number, since it is larger than the sum of its proper divisors (1).

13979291 is an equidigital number, since it uses as much as digits as its factorization.

13979291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 13979291 is about 3738.8890061086. The cubic root of 13979291 is about 240.8953305452.

The spelling of 13979291 in words is "thirteen million, nine hundred seventy-nine thousand, two hundred ninety-one".