13620559 has 4 divisors (see below), whose sum is σ = 13807216. Its totient is φ = 13433904.

The previous prime is 13620533. The next prime is 13620571. The reversal of 13620559 is 95502631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13620559 - 2⁵ = 13620527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13620559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620059) 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, 93219 + ... + 93364.

It is an arithmetic number, because the mean of its divisors is an integer number (3451804).

Almost surely, 2^13620559 is an apocalyptic number.

13620559 is a deficient number, since it is larger than the sum of its proper divisors (186657).

13620559 is an equidigital number, since it uses as much as digits as its factorization.

13620559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186656.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 13620559 is about 3690.6041510842. The cubic root of 13620559 is about 238.8168563624.

The spelling of 13620559 in words is "thirteen million, six hundred twenty thousand, five hundred fifty-nine".