12717999 has 24 divisors (see below), whose sum is σ = 21919920. Its totient is φ = 7266672.

The previous prime is 12717983. The next prime is 12718003. The reversal of 12717999 is 99971721.

12717999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12717999 - 2⁴ = 12717983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12717949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3484 + ... + 6129.

It is an arithmetic number, because the mean of its divisors is an integer number (913330).

Almost surely, 2^12717999 is an apocalyptic number.

12717999 is a deficient number, since it is larger than the sum of its proper divisors (9201921).

12717999 is an equidigital number, since it uses as much as digits as its factorization.

12717999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9636 (or 9623 counting only the distinct ones).

The product of its digits is 71442, while the sum is 45.

The square root of 12717999 is about 3566.2303627220. The cubic root of 12717999 is about 233.4208227469.

The spelling of 12717999 in words is "twelve million, seven hundred seventeen thousand, nine hundred ninety-nine".