12639337 has 4 divisors (see below), whose sum is σ = 12648580. Its totient is φ = 12630096.

The previous prime is 12639329. The next prime is 12639353. The reversal of 12639337 is 73393621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10732176 + 1907161 = 3276^2 + 1381^2 .

It is a cyclic number.

It is not a de Polignac number, because 12639337 - 2³ = 12639329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12639637) 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, 2118 + ... + 5455.

It is an arithmetic number, because the mean of its divisors is an integer number (3162145).

Almost surely, 2^12639337 is an apocalyptic number.

It is an amenable number.

12639337 is a deficient number, since it is larger than the sum of its proper divisors (9243).

12639337 is an equidigital number, since it uses as much as digits as its factorization.

12639337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9242.

The product of its digits is 20412, while the sum is 34.

The square root of 12639337 is about 3555.1845240437. The cubic root of 12639337 is about 232.9385840204.

The spelling of 12639337 in words is "twelve million, six hundred thirty-nine thousand, three hundred thirty-seven".