12918823 has 4 divisors (see below), whose sum is σ = 12968208. Its totient is φ = 12869440.

The previous prime is 12918811. The next prime is 12918839. The reversal of 12918823 is 32881921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32881921 = 109 ⋅301669.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12918823 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 (12918853) 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, 24298 + ... + 24823.

It is an arithmetic number, because the mean of its divisors is an integer number (3242052).

Almost surely, 2^12918823 is an apocalyptic number.

12918823 is a deficient number, since it is larger than the sum of its proper divisors (49385).

12918823 is an equidigital number, since it uses as much as digits as its factorization.

12918823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49384.

The product of its digits is 6912, while the sum is 34.

The square root of 12918823 is about 3594.2764223137. The cubic root of 12918823 is about 234.6430252401.

The spelling of 12918823 in words is "twelve million, nine hundred eighteen thousand, eight hundred twenty-three".