12844409 has 4 divisors (see below), whose sum is σ = 12969216. Its totient is φ = 12719604.

The previous prime is 12844393. The next prime is 12844417. The reversal of 12844409 is 90444821.

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 12844409 - 2⁴ = 12844393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12844459) 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, 62249 + ... + 62454.

It is an arithmetic number, because the mean of its divisors is an integer number (3242304).

Almost surely, 2^12844409 is an apocalyptic number.

It is an amenable number.

12844409 is a deficient number, since it is larger than the sum of its proper divisors (124807).

12844409 is a wasteful number, since it uses less digits than its factorization.

12844409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124806.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 12844409 is about 3583.9097365866. The cubic root of 12844409 is about 234.1916332652.

The spelling of 12844409 in words is "twelve million, eight hundred forty-four thousand, four hundred nine".