12639339 has 6 divisors (see below), whose sum is σ = 18256836. Its totient is φ = 8426220.

The previous prime is 12639329. The next prime is 12639353. The reversal of 12639339 is 93393621.

It is a happy number.

12639339 is a `hidden beast` number, since 12 + 639 + 3 + 3 + 9 = 666.

12639339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12639339 - 2⁸ = 12639083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12639329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702177 + ... + 702194.

It is an arithmetic number, because the mean of its divisors is an integer number (3042806).

Almost surely, 2^12639339 is an apocalyptic number.

12639339 is a deficient number, since it is larger than the sum of its proper divisors (5617497).

12639339 is a wasteful number, since it uses less digits than its factorization.

12639339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404377 (or 1404374 counting only the distinct ones).

The product of its digits is 26244, while the sum is 36.

The square root of 12639339 is about 3555.1848053231. The cubic root of 12639339 is about 232.9385963069.

The spelling of 12639339 in words is "twelve million, six hundred thirty-nine thousand, three hundred thirty-nine".