13285809 has 8 divisors (see below), whose sum is σ = 19682720. Its totient is φ = 8857188.

The previous prime is 13285793. The next prime is 13285817. The reversal of 13285809 is 90858231.

It is not a de Polignac number, because 13285809 - 2⁴ = 13285793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13285859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246007 + ... + 246060.

It is an arithmetic number, because the mean of its divisors is an integer number (2460340).

Almost surely, 2^13285809 is an apocalyptic number.

It is an amenable number.

13285809 is a deficient number, since it is larger than the sum of its proper divisors (6396911).

13285809 is an equidigital number, since it uses as much as digits as its factorization.

13285809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492076 (or 492070 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 13285809 is about 3644.9703702499. The cubic root of 13285809 is about 236.8441532688.

The spelling of 13285809 in words is "thirteen million, two hundred eighty-five thousand, eight hundred nine".