12644713 has 4 divisors (see below), whose sum is σ = 12986500. Its totient is φ = 12302928.

The previous prime is 12644707. The next prime is 12644741. The reversal of 12644713 is 31744621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31744621 = 43 ⋅738247.

It can be written as a sum of positive squares in 2 ways, for example, as 11812969 + 831744 = 3437^2 + 912^2 .

It is a cyclic number.

It is not a de Polignac number, because 12644713 - 2⁹ = 12644201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12644213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170838 + ... + 170911.

It is an arithmetic number, because the mean of its divisors is an integer number (3246625).

Almost surely, 2^12644713 is an apocalyptic number.

It is an amenable number.

12644713 is a deficient number, since it is larger than the sum of its proper divisors (341787).

12644713 is an equidigital number, since it uses as much as digits as its factorization.

12644713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341786.

The product of its digits is 4032, while the sum is 28.

The square root of 12644713 is about 3555.9405225622. The cubic root of 12644713 is about 232.9716052758.

The spelling of 12644713 in words is "twelve million, six hundred forty-four thousand, seven hundred thirteen".