12641679 has 12 divisors (see below), whose sum is σ = 18754216. Its totient is φ = 8199792.

The previous prime is 12641677. The next prime is 12641683. The reversal of 12641679 is 97614621.

12641679 is a `hidden beast` number, since 1 + 2 + 641 + 6 + 7 + 9 = 666.

12641679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12641679 - 2¹ = 12641677 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 (12641677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18649 + ... + 19314.

Almost surely, 2^12641679 is an apocalyptic number.

12641679 is a deficient number, since it is larger than the sum of its proper divisors (6112537).

12641679 is a wasteful number, since it uses less digits than its factorization.

12641679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38006 (or 38003 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 12641679 is about 3555.5138869086. The cubic root of 12641679 is about 232.9529705470.

The spelling of 12641679 in words is "twelve million, six hundred forty-one thousand, six hundred seventy-nine".