12912823 has 12 divisors (see below), whose sum is σ = 16387272. Its totient is φ = 10061520.

The previous prime is 12912773. The next prime is 12912847. The reversal of 12912823 is 32821921.

It is not a de Polignac number, because 12912823 - 2⁹ = 12912311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12912791 and 12912800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12912853) 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 11 ways as a sum of consecutive naturals, for example, 11440 + ... + 12517.

It is an arithmetic number, because the mean of its divisors is an integer number (1365606).

Almost surely, 2^12912823 is an apocalyptic number.

12912823 is a deficient number, since it is larger than the sum of its proper divisors (3474449).

12912823 is a wasteful number, since it uses less digits than its factorization.

12912823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23982 (or 23975 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 12912823 is about 3593.4416650337. The cubic root of 12912823 is about 234.6066938560.

It can be divided in two parts, 1291 and 2823, that added together give a palindrome (4114).

The spelling of 12912823 in words is "twelve million, nine hundred twelve thousand, eight hundred twenty-three".