12788839 has 4 divisors (see below), whose sum is σ = 14615824. Its totient is φ = 10961856.

The previous prime is 12788801. The next prime is 12788857. The reversal of 12788839 is 93888721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12788839 - 2⁹ = 12788327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12788869) 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 in 3 ways as a sum of consecutive naturals, for example, 913482 + ... + 913495.

It is an arithmetic number, because the mean of its divisors is an integer number (3653956).

Almost surely, 2^12788839 is an apocalyptic number.

12788839 is a deficient number, since it is larger than the sum of its proper divisors (1826985).

12788839 is an equidigital number, since it uses as much as digits as its factorization.

12788839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826984.

The product of its digits is 193536, while the sum is 46.

The square root of 12788839 is about 3576.1486266653. The cubic root of 12788839 is about 233.8534097821.

The spelling of 12788839 in words is "twelve million, seven hundred eighty-eight thousand, eight hundred thirty-nine".