13405609 has 16 divisors (see below), whose sum is σ = 15953920. Its totient is φ = 11022480.

The previous prime is 13405607. The next prime is 13405631. The reversal of 13405609 is 90650431.

13405609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13405609 - 2¹ = 13405607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13405607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35182 + ... + 35560.

It is an arithmetic number, because the mean of its divisors is an integer number (997120).

Almost surely, 2^13405609 is an apocalyptic number.

It is an amenable number.

13405609 is a deficient number, since it is larger than the sum of its proper divisors (2548311).

13405609 is a wasteful number, since it uses less digits than its factorization.

13405609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 13405609 is about 3661.3670944061. The cubic root of 13405609 is about 237.5539098305.

The spelling of 13405609 in words is "thirteen million, four hundred five thousand, six hundred nine".