13122609 has 4 divisors (see below), whose sum is σ = 17496816. Its totient is φ = 8748404.

The previous prime is 13122607. The next prime is 13122631. The reversal of 13122609 is 90622131.

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 13122609 - 2¹ = 13122607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13122601) 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, 2187099 + ... + 2187104.

It is an arithmetic number, because the mean of its divisors is an integer number (4374204).

Almost surely, 2^13122609 is an apocalyptic number.

It is an amenable number.

13122609 is a deficient number, since it is larger than the sum of its proper divisors (4374207).

13122609 is an equidigital number, since it uses as much as digits as its factorization.

13122609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374206.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 13122609 is about 3622.5141821669. The cubic root of 13122609 is about 235.8703743284.

It can be divided in two parts, 13122 and 609, that added together give a palindrome (13731).

The spelling of 13122609 in words is "thirteen million, one hundred twenty-two thousand, six hundred nine".