13979645 has 8 divisors (see below), whose sum is σ = 16814304. Its totient is φ = 11157904.

The previous prime is 13979639. The next prime is 13979671. The reversal of 13979645 is 54697931.

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 13979645 - 2⁴ = 13979629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13979596 and 13979605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659 + ... + 5328.

It is an arithmetic number, because the mean of its divisors is an integer number (2101788).

Almost surely, 2^13979645 is an apocalyptic number.

It is an amenable number.

13979645 is a deficient number, since it is larger than the sum of its proper divisors (2834659).

13979645 is an equidigital number, since it uses as much as digits as its factorization.

13979645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6459.

The product of its digits is 204120, while the sum is 44.

The square root of 13979645 is about 3738.9363460749. The cubic root of 13979645 is about 240.8973639393.

The spelling of 13979645 in words is "thirteen million, nine hundred seventy-nine thousand, six hundred forty-five".