13605889 has 8 divisors (see below), whose sum is σ = 15159168. Its totient is φ = 12105360.

The previous prime is 13605887. The next prime is 13605923. The reversal of 13605889 is 98850631.

It is a happy number.

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 13605889 - 2¹ = 13605887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13605883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12642 + ... + 13675.

It is an arithmetic number, because the mean of its divisors is an integer number (1894896).

Almost surely, 2^13605889 is an apocalyptic number.

It is an amenable number.

13605889 is a deficient number, since it is larger than the sum of its proper divisors (1553279).

13605889 is a wasteful number, since it uses less digits than its factorization.

13605889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26375.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 13605889 is about 3688.6161361681. The cubic root of 13605889 is about 238.7310864653.

The spelling of 13605889 in words is "thirteen million, six hundred five thousand, eight hundred eighty-nine".