12647639 has 8 divisors (see below), whose sum is σ = 13018320. Its totient is φ = 12280000.

The previous prime is 12647627. The next prime is 12647647. The reversal of 12647639 is 93674621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12647639 - 2¹⁶ = 12582103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9677 + ... + 10905.

It is an arithmetic number, because the mean of its divisors is an integer number (1627290).

Almost surely, 2^12647639 is an apocalyptic number.

12647639 is a deficient number, since it is larger than the sum of its proper divisors (370681).

12647639 is a wasteful number, since it uses less digits than its factorization.

12647639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521.

The product of its digits is 54432, while the sum is 38.

The square root of 12647639 is about 3556.3519229683. The cubic root of 12647639 is about 232.9895738487.

The spelling of 12647639 in words is "twelve million, six hundred forty-seven thousand, six hundred thirty-nine".