13979561 has 8 divisors (see below), whose sum is σ = 14633664. Its totient is φ = 13329360.

The previous prime is 13979549. The next prime is 13979579. The reversal of 13979561 is 16597931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13979561 - 2¹⁰ = 13978537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13979501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8366 + ... + 9896.

It is an arithmetic number, because the mean of its divisors is an integer number (1829208).

Almost surely, 2^13979561 is an apocalyptic number.

It is an amenable number.

13979561 is a deficient number, since it is larger than the sum of its proper divisors (654103).

13979561 is a wasteful number, since it uses less digits than its factorization.

13979561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951.

The product of its digits is 51030, while the sum is 41.

The square root of 13979561 is about 3738.9251129168. The cubic root of 13979561 is about 240.8968814421.

The spelling of 13979561 in words is "thirteen million, nine hundred seventy-nine thousand, five hundred sixty-one".