12644199 has 6 divisors (see below), whose sum is σ = 18263856. Its totient is φ = 8429460.

The previous prime is 12644197. The next prime is 12644201. The reversal of 12644199 is 99144621.

It is a happy number.

12644199 is a `hidden beast` number, since 1 + 2 + 644 + 1 + 9 + 9 = 666.

12644199 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12644197) and next prime (12644201).

It is not a de Polignac number, because 12644199 - 2¹ = 12644197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702447 + ... + 702464.

It is an arithmetic number, because the mean of its divisors is an integer number (3043976).

Almost surely, 2^12644199 is an apocalyptic number.

12644199 is a deficient number, since it is larger than the sum of its proper divisors (5619657).

12644199 is a wasteful number, since it uses less digits than its factorization.

12644199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404917 (or 1404914 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 12644199 is about 3555.8682484029. The cubic root of 12644199 is about 232.9684485143.

The spelling of 12644199 in words is "twelve million, six hundred forty-four thousand, one hundred ninety-nine".