13081009 has 4 divisors (see below), whose sum is σ = 13400100. Its totient is φ = 12761920.

The previous prime is 13080989. The next prime is 13081031. The reversal of 13081009 is 90018031.

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 2712609 + 10368400 = 1647^2 + 3220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13081009 is a prime.

It is a super-2 number, since 2×13081009² = 342225592916162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13081099) 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 3 ways as a sum of consecutive naturals, for example, 159484 + ... + 159565.

It is an arithmetic number, because the mean of its divisors is an integer number (3350025).

Almost surely, 2^13081009 is an apocalyptic number.

It is an amenable number.

13081009 is a deficient number, since it is larger than the sum of its proper divisors (319091).

13081009 is an equidigital number, since it uses as much as digits as its factorization.

13081009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319090.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 13081009 is about 3616.7677558837. The cubic root of 13081009 is about 235.6208661593.

The spelling of 13081009 in words is "thirteen million, eighty-one thousand, nine".