13172609 has 4 divisors (see below), whose sum is σ = 13195200. Its totient is φ = 13150020.

The previous prime is 13172597. The next prime is 13172611. The reversal of 13172609 is 90627131.

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 a de Polignac number, because none of the positive numbers 2^k-13172609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13172639) 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, 10397 + ... + 11594.

It is an arithmetic number, because the mean of its divisors is an integer number (3298800).

Almost surely, 2^13172609 is an apocalyptic number.

It is an amenable number.

13172609 is a deficient number, since it is larger than the sum of its proper divisors (22591).

13172609 is an equidigital number, since it uses as much as digits as its factorization.

13172609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22590.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 13172609 is about 3629.4089050423. The cubic root of 13172609 is about 236.1695671621.

The spelling of 13172609 in words is "thirteen million, one hundred seventy-two thousand, six hundred nine".