12823563 has 4 divisors (see below), whose sum is σ = 17098088. Its totient is φ = 8549040.

The previous prime is 12823541. The next prime is 12823607. The reversal of 12823563 is 36532821.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12823563 - 2⁹ = 12823051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12823563.

It is not an unprimeable number, because it can be changed into a prime (12823513) 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, 2137258 + ... + 2137263.

It is an arithmetic number, because the mean of its divisors is an integer number (4274522).

Almost surely, 2^12823563 is an apocalyptic number.

12823563 is a deficient number, since it is larger than the sum of its proper divisors (4274525).

12823563 is an equidigital number, since it uses as much as digits as its factorization.

12823563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274524.

The product of its digits is 8640, while the sum is 30.

The square root of 12823563 is about 3581.0002792516. Note that the first 3 decimals coincide. The cubic root of 12823563 is about 234.0648698812.

The spelling of 12823563 in words is "twelve million, eight hundred twenty-three thousand, five hundred sixty-three".