12823563979 has 4 divisors (see below), whose sum is σ = 12869199720. Its totient is φ = 12777928240.

The previous prime is 12823563953. The next prime is 12823563983. The reversal of 12823563979 is 97936532821.

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

It is a cyclic number.

It is not a de Polignac number, because 12823563979 - 2¹⁵ = 12823531211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12823563479) 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, 22817449 + ... + 22818010.

It is an arithmetic number, because the mean of its divisors is an integer number (3217299930).

Almost surely, 2^12823563979 is an apocalyptic number.

12823563979 is a deficient number, since it is larger than the sum of its proper divisors (45635741).

12823563979 is an equidigital number, since it uses as much as digits as its factorization.

12823563979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45635740.

The product of its digits is 4898880, while the sum is 55.

The spelling of 12823563979 in words is "twelve billion, eight hundred twenty-three million, five hundred sixty-three thousand, nine hundred seventy-nine".