13412809 has 4 divisors (see below), whose sum is σ = 13420800. Its totient is φ = 13404820.

The previous prime is 13412807. The next prime is 13412821. The reversal of 13412809 is 90821431.

It is a happy number.

13412809 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13412809 - 2¹ = 13412807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13412807) 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, 397 + ... + 5194.

It is an arithmetic number, because the mean of its divisors is an integer number (3355200).

Almost surely, 2^13412809 is an apocalyptic number.

It is an amenable number.

13412809 is a deficient number, since it is larger than the sum of its proper divisors (7991).

13412809 is an equidigital number, since it uses as much as digits as its factorization.

13412809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7990.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 13412809 is about 3662.3502017147. The cubic root of 13412809 is about 237.5964313857.

The spelling of 13412809 in words is "thirteen million, four hundred twelve thousand, eight hundred nine".