12813647 has 12 divisors (see below), whose sum is σ = 16261416. Its totient is φ = 9984240.

The previous prime is 12813643. The next prime is 12813649. The reversal of 12813647 is 74631821.

12813647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12813647 - 2² = 12813643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12813641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11348 + ... + 12425.

It is an arithmetic number, because the mean of its divisors is an integer number (1355118).

Almost surely, 2^12813647 is an apocalyptic number.

12813647 is a deficient number, since it is larger than the sum of its proper divisors (3447769).

12813647 is a wasteful number, since it uses less digits than its factorization.

12813647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23798 (or 23791 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 12813647 is about 3579.6154821433. The cubic root of 12813647 is about 234.0045230090.

The spelling of 12813647 in words is "twelve million, eight hundred thirteen thousand, six hundred forty-seven".