13979279 has 2 divisors, whose sum is σ = 13979280. Its totient is φ = 13979278.

The previous prime is 13979249. The next prime is 13979291. The reversal of 13979279 is 97297931.

It is a strong prime.

It is an emirp because it is prime and its reverse (97297931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13979279 - 2⁸ = 13979023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13979209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6989639 + 6989640.

It is an arithmetic number, because the mean of its divisors is an integer number (6989640).

Almost surely, 2^13979279 is an apocalyptic number.

13979279 is a deficient number, since it is larger than the sum of its proper divisors (1).

13979279 is an equidigital number, since it uses as much as digits as its factorization.

13979279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214326, while the sum is 47.

The square root of 13979279 is about 3738.8874013535. The cubic root of 13979279 is about 240.8952616159.

The spelling of 13979279 in words is "thirteen million, nine hundred seventy-nine thousand, two hundred seventy-nine".