12639693 has 24 divisors (see below), whose sum is σ = 19421856. Its totient is φ = 7250400.

The previous prime is 12639667. The next prime is 12639701. The reversal of 12639693 is 39693621.

It is not a de Polignac number, because 12639693 - 2⁹ = 12639181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12639793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11383 + ... + 12443.

It is an arithmetic number, because the mean of its divisors is an integer number (809244).

Almost surely, 2^12639693 is an apocalyptic number.

It is an amenable number.

12639693 is a deficient number, since it is larger than the sum of its proper divisors (6782163).

12639693 is a wasteful number, since it uses less digits than its factorization.

12639693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1094 counting only the distinct ones).

The product of its digits is 52488, while the sum is 39.

The square root of 12639693 is about 3555.2345914159. The cubic root of 12639693 is about 232.9407709853.

The spelling of 12639693 in words is "twelve million, six hundred thirty-nine thousand, six hundred ninety-three".