12664793 has 4 divisors (see below), whose sum is σ = 13101540. Its totient is φ = 12228048.

The previous prime is 12664781. The next prime is 12664807. The reversal of 12664793 is 39746621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7038409 + 5626384 = 2653^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 12664793 - 2⁸ = 12664537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12664723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218330 + ... + 218387.

It is an arithmetic number, because the mean of its divisors is an integer number (3275385).

Almost surely, 2^12664793 is an apocalyptic number.

It is an amenable number.

12664793 is a deficient number, since it is larger than the sum of its proper divisors (436747).

12664793 is an equidigital number, since it uses as much as digits as its factorization.

12664793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436746.

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

The square root of 12664793 is about 3558.7628468332. The cubic root of 12664793 is about 233.0948608934.

The spelling of 12664793 in words is "twelve million, six hundred sixty-four thousand, seven hundred ninety-three".