12663439 has 2 divisors, whose sum is σ = 12663440. Its totient is φ = 12663438.

The previous prime is 12663433. The next prime is 12663451. The reversal of 12663439 is 93436621.

It is a happy number.

12663439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12663439 - 2⁷ = 12663311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12663433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6331719 + 6331720.

It is an arithmetic number, because the mean of its divisors is an integer number (6331720).

Almost surely, 2^12663439 is an apocalyptic number.

12663439 is a deficient number, since it is larger than the sum of its proper divisors (1).

12663439 is an equidigital number, since it uses as much as digits as its factorization.

12663439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 12663439 is about 3558.5726070997. The cubic root of 12663439 is about 233.0865538307.

The spelling of 12663439 in words is "twelve million, six hundred sixty-three thousand, four hundred thirty-nine".