12894439 has 2 divisors, whose sum is σ = 12894440. Its totient is φ = 12894438.

The previous prime is 12894433. The next prime is 12894443. The reversal of 12894439 is 93449821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12894439 - 2⁹ = 12893927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12894433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6447219 + 6447220.

It is an arithmetic number, because the mean of its divisors is an integer number (6447220).

Almost surely, 2^12894439 is an apocalyptic number.

12894439 is a deficient number, since it is larger than the sum of its proper divisors (1).

12894439 is an equidigital number, since it uses as much as digits as its factorization.

12894439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 12894439 is about 3590.8827605479. The cubic root of 12894439 is about 234.4953043766.

The spelling of 12894439 in words is "twelve million, eight hundred ninety-four thousand, four hundred thirty-nine".