13979479 has 4 divisors (see below), whose sum is σ = 14461560. Its totient is φ = 13497400.

The previous prime is 13979461. The next prime is 13979501. The reversal of 13979479 is 97497931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97497931 = 67 ⋅1455193.

It is a cyclic number.

It is not a de Polignac number, because 13979479 - 2⁵ = 13979447 is a prime.

It is a super-2 number, since 2×13979479² = 390851666222882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13979179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240997 + ... + 241054.

It is an arithmetic number, because the mean of its divisors is an integer number (3615390).

Almost surely, 2^13979479 is an apocalyptic number.

13979479 is a deficient number, since it is larger than the sum of its proper divisors (482081).

13979479 is an equidigital number, since it uses as much as digits as its factorization.

13979479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482080.

The product of its digits is 428652, while the sum is 49.

The square root of 13979479 is about 3738.9141471823. The cubic root of 13979479 is about 240.8964104311.

The spelling of 13979479 in words is "thirteen million, nine hundred seventy-nine thousand, four hundred seventy-nine".