12444409 has 4 divisors (see below), whose sum is σ = 12516516. Its totient is φ = 12372304.

The previous prime is 12444407. The next prime is 12444413. The reversal of 12444409 is 90444421.

12444409 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90444421 = 191 ⋅473531.

It can be written as a sum of positive squares in 2 ways, for example, as 4826809 + 7617600 = 2197^2 + 2760^2 .

It is a cyclic number.

It is not a de Polignac number, because 12444409 - 2¹ = 12444407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12444407) 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, 35794 + ... + 36139.

It is an arithmetic number, because the mean of its divisors is an integer number (3129129).

Almost surely, 2^12444409 is an apocalyptic number.

It is an amenable number.

12444409 is a deficient number, since it is larger than the sum of its proper divisors (72107).

12444409 is an equidigital number, since it uses as much as digits as its factorization.

12444409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72106.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 12444409 is about 3527.6633909714. The cubic root of 12444409 is about 231.7348896485.

The spelling of 12444409 in words is "twelve million, four hundred forty-four thousand, four hundred nine".