12493409 has 4 divisors (see below), whose sum is σ = 12644016. Its totient is φ = 12342804.

The previous prime is 12493391. The next prime is 12493421. The reversal of 12493409 is 90439421.

It is a happy number.

12493409 is digitally balanced in base 2, 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90439421 = 47 ⋅1924243.

It is a cyclic number.

It is not a de Polignac number, because 12493409 - 2¹⁶ = 12427873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12493499) 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, 75179 + ... + 75344.

It is an arithmetic number, because the mean of its divisors is an integer number (3161004).

Almost surely, 2^12493409 is an apocalyptic number.

It is an amenable number.

12493409 is a deficient number, since it is larger than the sum of its proper divisors (150607).

12493409 is an equidigital number, since it uses as much as digits as its factorization.

12493409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150606.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12493409 is about 3534.6016748709. The cubic root of 12493409 is about 232.0386442266.

The spelling of 12493409 in words is "twelve million, four hundred ninety-three thousand, four hundred nine".