13075209 has 24 divisors (see below), whose sum is σ = 22535520. Its totient is φ = 7470792.

The previous prime is 13075207. The next prime is 13075243. The reversal of 13075209 is 90257031.

13075209 is a `hidden beast` number, since 130 + 7 + 520 + 9 = 666.

13075209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13075209 - 2¹ = 13075207 is a prime.

It is a super-2 number, since 2×13075209² = 341922180787362, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13075207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3619 + ... + 6264.

It is an arithmetic number, because the mean of its divisors is an integer number (938980).

Almost surely, 2^13075209 is an apocalyptic number.

It is an amenable number.

13075209 is a deficient number, since it is larger than the sum of its proper divisors (9460311).

13075209 is an equidigital number, since it uses as much as digits as its factorization.

13075209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9906 (or 9893 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 13075209 is about 3615.9658460776. The cubic root of 13075209 is about 235.5860369640.

The spelling of 13075209 in words is "thirteen million, seventy-five thousand, two hundred nine".