12804439 has 2 divisors, whose sum is σ = 12804440. Its totient is φ = 12804438.

The previous prime is 12804433. The next prime is 12804443. The reversal of 12804439 is 93440821.

12804439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (93440821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12804439 - 2¹³ = 12796247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12804439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12804433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6402219 + 6402220.

It is an arithmetic number, because the mean of its divisors is an integer number (6402220).

Almost surely, 2^12804439 is an apocalyptic number.

12804439 is a deficient number, since it is larger than the sum of its proper divisors (1).

12804439 is an equidigital number, since it uses as much as digits as its factorization.

12804439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 12804439 is about 3578.3290793330. The cubic root of 12804439 is about 233.9484570041.

The spelling of 12804439 in words is "twelve million, eight hundred four thousand, four hundred thirty-nine".