13612809 has 8 divisors (see below), whose sum is σ = 20743360. Its totient is φ = 7778736.

The previous prime is 13612799. The next prime is 13612831. The reversal of 13612809 is 90821631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13612809 - 2⁴ = 13612793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13612889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324094 + ... + 324135.

It is an arithmetic number, because the mean of its divisors is an integer number (2592920).

Almost surely, 2^13612809 is an apocalyptic number.

It is an amenable number.

13612809 is a deficient number, since it is larger than the sum of its proper divisors (7130551).

13612809 is an equidigital number, since it uses as much as digits as its factorization.

13612809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648239.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 13612809 is about 3689.5540380919. The cubic root of 13612809 is about 238.7715527449.

The spelling of 13612809 in words is "thirteen million, six hundred twelve thousand, eight hundred nine".