12639359 has 2 divisors, whose sum is σ = 12639360. Its totient is φ = 12639358.

The previous prime is 12639353. The next prime is 12639371. The reversal of 12639359 is 95393621.

It is a weak prime.

It is an emirp because it is prime and its reverse (95393621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12639359 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12639353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319679 + 6319680.

It is an arithmetic number, because the mean of its divisors is an integer number (6319680).

Almost surely, 2^12639359 is an apocalyptic number.

12639359 is a deficient number, since it is larger than the sum of its proper divisors (1).

12639359 is an equidigital number, since it uses as much as digits as its factorization.

12639359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 38.

The square root of 12639359 is about 3555.1876181153. The cubic root of 12639359 is about 232.9387191711.

The spelling of 12639359 in words is "twelve million, six hundred thirty-nine thousand, three hundred fifty-nine".