12997563 has 4 divisors (see below), whose sum is σ = 17330088. Its totient is φ = 8665040.

The previous prime is 12997549. The next prime is 12997573. The reversal of 12997563 is 36579921.

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 12997563 - 2⁶ = 12997499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12997513) 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, 2166258 + ... + 2166263.

It is an arithmetic number, because the mean of its divisors is an integer number (4332522).

Almost surely, 2^12997563 is an apocalyptic number.

12997563 is a deficient number, since it is larger than the sum of its proper divisors (4332525).

12997563 is an equidigital number, since it uses as much as digits as its factorization.

12997563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332524.

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

The square root of 12997563 is about 3605.2133085297. The cubic root of 12997563 is about 235.1187750266.

The spelling of 12997563 in words is "twelve million, nine hundred ninety-seven thousand, five hundred sixty-three".