13408609 has 4 divisors (see below), whose sum is σ = 13991616. Its totient is φ = 12825604.

The previous prime is 13408579. The next prime is 13408613. The reversal of 13408609 is 90680431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90680431 = 17 ⋅5334143.

It is a cyclic number.

It is not a de Polignac number, because 13408609 - 2⁷ = 13408481 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13408639) 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 3 ways as a sum of consecutive naturals, for example, 291469 + ... + 291514.

It is an arithmetic number, because the mean of its divisors is an integer number (3497904).

Almost surely, 2^13408609 is an apocalyptic number.

It is an amenable number.

13408609 is a deficient number, since it is larger than the sum of its proper divisors (583007).

13408609 is an equidigital number, since it uses as much as digits as its factorization.

13408609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583006.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 13408609 is about 3661.7767545278. The cubic root of 13408609 is about 237.5716289950.

The spelling of 13408609 in words is "thirteen million, four hundred eight thousand, six hundred nine".