12644979 has 8 divisors (see below), whose sum is σ = 16876992. Its totient is φ = 8421480.

The previous prime is 12644941. The next prime is 12645011. The reversal of 12644979 is 97944621.

12644979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12644979 - 2¹³ = 12636787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12644979.

It is not an unprimeable number, because it can be changed into a prime (12644909) 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, 3372 + ... + 6054.

It is an arithmetic number, because the mean of its divisors is an integer number (2109624).

Almost surely, 2^12644979 is an apocalyptic number.

12644979 is a deficient number, since it is larger than the sum of its proper divisors (4232013).

12644979 is a wasteful number, since it uses less digits than its factorization.

12644979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4257.

The product of its digits is 108864, while the sum is 42.

The square root of 12644979 is about 3555.9779245659. The cubic root of 12644979 is about 232.9732388969.

The spelling of 12644979 in words is "twelve million, six hundred forty-four thousand, nine hundred seventy-nine".