12639583 has 4 divisors (see below), whose sum is σ = 13788648. Its totient is φ = 11490520.

The previous prime is 12639577. The next prime is 12639637. The reversal of 12639583 is 38593621.

12639583 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12639583 - 2⁹ = 12639071 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 (12639083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574516 + ... + 574537.

It is an arithmetic number, because the mean of its divisors is an integer number (3447162).

Almost surely, 2^12639583 is an apocalyptic number.

12639583 is a deficient number, since it is larger than the sum of its proper divisors (1149065).

12639583 is a wasteful number, since it uses less digits than its factorization.

12639583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149064.

The product of its digits is 38880, while the sum is 37.

The square root of 12639583 is about 3555.2191212357. The cubic root of 12639583 is about 232.9400952421.

The spelling of 12639583 in words is "twelve million, six hundred thirty-nine thousand, five hundred eighty-three".