13082809 has 4 divisors (see below), whose sum is σ = 13852404. Its totient is φ = 12313216.

The previous prime is 13082803. The next prime is 13082863. The reversal of 13082809 is 90828031.

13082809 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8970025 + 4112784 = 2995^2 + 2028^2 .

It is a cyclic number.

It is not a de Polignac number, because 13082809 - 2⁵ = 13082777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13082803) 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, 384772 + ... + 384805.

It is an arithmetic number, because the mean of its divisors is an integer number (3463101).

Almost surely, 2^13082809 is an apocalyptic number.

It is an amenable number.

13082809 is a deficient number, since it is larger than the sum of its proper divisors (769595).

13082809 is an equidigital number, since it uses as much as digits as its factorization.

13082809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769594.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 13082809 is about 3617.0165882948. The cubic root of 13082809 is about 235.6316731266.

The spelling of 13082809 in words is "thirteen million, eighty-two thousand, eight hundred nine".