12920823 has 16 divisors (see below), whose sum is σ = 19468800. Its totient is φ = 8466840.

The previous prime is 12920821. The next prime is 12920827. The reversal of 12920823 is 32802921.

It is a happy number.

It is not a de Polignac number, because 12920823 - 2¹ = 12920821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12920821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2463 + ... + 5648.

It is an arithmetic number, because the mean of its divisors is an integer number (1216800).

Almost surely, 2^12920823 is an apocalyptic number.

12920823 is a deficient number, since it is larger than the sum of its proper divisors (6547977).

12920823 is an equidigital number, since it uses as much as digits as its factorization.

12920823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8179 (or 8173 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12920823 is about 3594.5546316616. The cubic root of 12920823 is about 234.6551332016.

The spelling of 12920823 in words is "twelve million, nine hundred twenty thousand, eight hundred twenty-three".