12563979 has 8 divisors (see below), whose sum is σ = 17204880. Its totient is φ = 8149536.

The previous prime is 12563977. The next prime is 12564001. The reversal of 12563979 is 97936521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12563979 - 2¹ = 12563977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12563979.

It is not an unprimeable number, because it can be changed into a prime (12563977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56484 + ... + 56705.

It is an arithmetic number, because the mean of its divisors is an integer number (2150610).

Almost surely, 2^12563979 is an apocalyptic number.

12563979 is a deficient number, since it is larger than the sum of its proper divisors (4640901).

12563979 is a wasteful number, since it uses less digits than its factorization.

12563979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113229.

The product of its digits is 102060, while the sum is 42.

The square root of 12563979 is about 3544.5703547821. The cubic root of 12563979 is about 232.4747203408.

It can be divided in two parts, 1 and 2563979, that added together give a triangular number (2563980 = T₂₂₆₄).

The spelling of 12563979 in words is "twelve million, five hundred sixty-three thousand, nine hundred seventy-nine".