12638823 has 4 divisors (see below), whose sum is σ = 16851768. Its totient is φ = 8425880.

The previous prime is 12638807. The next prime is 12638827. The reversal of 12638823 is 32883621.

12638823 is digitally balanced in base 2, base 3 and base 4, because in such bases 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 an emirpimes, since its reverse is a distinct semiprime: 32883621 = 3 ⋅10961207.

It is a cyclic number.

It is not a de Polignac number, because 12638823 - 2⁴ = 12638807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638827) 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, 2106468 + ... + 2106473.

It is an arithmetic number, because the mean of its divisors is an integer number (4212942).

Almost surely, 2^12638823 is an apocalyptic number.

12638823 is a deficient number, since it is larger than the sum of its proper divisors (4212945).

12638823 is an equidigital number, since it uses as much as digits as its factorization.

12638823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212944.

The product of its digits is 13824, while the sum is 33.

The square root of 12638823 is about 3555.1122345152. The cubic root of 12638823 is about 232.9354263639.

The spelling of 12638823 in words is "twelve million, six hundred thirty-eight thousand, eight hundred twenty-three".