13305609 has 12 divisors (see below), whose sum is σ = 19264752. Its totient is φ = 8849400.

The previous prime is 13305601. The next prime is 13305641. The reversal of 13305609 is 90650331.

It is not a de Polignac number, because 13305609 - 2³ = 13305601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13305601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2914 + ... + 5924.

It is an arithmetic number, because the mean of its divisors is an integer number (1605396).

Almost surely, 2^13305609 is an apocalyptic number.

It is an amenable number.

13305609 is a deficient number, since it is larger than the sum of its proper divisors (5959143).

13305609 is a wasteful number, since it uses less digits than its factorization.

13305609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508 (or 3505 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 13305609 is about 3647.6854305162. The cubic root of 13305609 is about 236.9617520930.

The spelling of 13305609 in words is "thirteen million, three hundred five thousand, six hundred nine".