13056009 has 4 divisors (see below), whose sum is σ = 17408016. Its totient is φ = 8704004.

The previous prime is 13055993. The next prime is 13056011. The reversal of 13056009 is 90065031.

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.

It is a cyclic number.

It is not a de Polignac number, because 13056009 - 2⁴ = 13055993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13056009.

It is not an unprimeable number, because it can be changed into a prime (13056209) 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, 2175999 + ... + 2176004.

It is an arithmetic number, because the mean of its divisors is an integer number (4352004).

Almost surely, 2^13056009 is an apocalyptic number.

It is an amenable number.

13056009 is a deficient number, since it is larger than the sum of its proper divisors (4352007).

13056009 is an equidigital number, since it uses as much as digits as its factorization.

13056009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352006.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 13056009 is about 3613.3099783993. The cubic root of 13056009 is about 235.4706667816.

The spelling of 13056009 in words is "thirteen million, fifty-six thousand, nine".