13409609 has 4 divisors (see below), whose sum is σ = 13421520. Its totient is φ = 13397700.

The previous prime is 13409603. The next prime is 13409633. The reversal of 13409609 is 90690431.

13409609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13409609 - 2⁸ = 13409353 is a prime.

It is a super-2 number, since 2×13409609² = 359635227065762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13409603) 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, 4067 + ... + 6584.

It is an arithmetic number, because the mean of its divisors is an integer number (3355380).

Almost surely, 2^13409609 is an apocalyptic number.

It is an amenable number.

13409609 is a deficient number, since it is larger than the sum of its proper divisors (11911).

13409609 is a wasteful number, since it uses less digits than its factorization.

13409609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11910.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 13409609 is about 3661.9132977175. The cubic root of 13409609 is about 237.5775347959.

The spelling of 13409609 in words is "thirteen million, four hundred nine thousand, six hundred nine".