12657823 has 4 divisors (see below), whose sum is σ = 12667120. Its totient is φ = 12648528.

The previous prime is 12657817. The next prime is 12657851. The reversal of 12657823 is 32875621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12657823 - 2⁵ = 12657791 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 (12657803) 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, 2163 + ... + 5476.

It is an arithmetic number, because the mean of its divisors is an integer number (3166780).

Almost surely, 2^12657823 is an apocalyptic number.

12657823 is a deficient number, since it is larger than the sum of its proper divisors (9297).

12657823 is an equidigital number, since it uses as much as digits as its factorization.

12657823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9296.

The product of its digits is 20160, while the sum is 34.

The square root of 12657823 is about 3557.7834391655. The cubic root of 12657823 is about 233.0520922167.

The spelling of 12657823 in words is "twelve million, six hundred fifty-seven thousand, eight hundred twenty-three".