12664013 has 4 divisors (see below), whose sum is σ = 13330560. Its totient is φ = 11997468.

The previous prime is 12663991. The next prime is 12664019. The reversal of 12664013 is 31046621.

It is a happy number.

12664013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31046621 = 61 ⋅508961.

It is a cyclic number.

It is not a de Polignac number, because 12664013 - 2⁶ = 12663949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12664013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664019) 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, 333245 + ... + 333282.

It is an arithmetic number, because the mean of its divisors is an integer number (3332640).

Almost surely, 2^12664013 is an apocalyptic number.

It is an amenable number.

12664013 is a deficient number, since it is larger than the sum of its proper divisors (666547).

12664013 is an equidigital number, since it uses as much as digits as its factorization.

12664013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666546.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12664013 is about 3558.6532565003. The cubic root of 12664013 is about 233.0900755086.

The spelling of 12664013 in words is "twelve million, six hundred sixty-four thousand, thirteen".