12817597 has 4 divisors (see below), whose sum is σ = 13803580. Its totient is φ = 11831616.

The previous prime is 12817591. The next prime is 12817619. The reversal of 12817597 is 79571821.

12817597 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6497401 + 6320196 = 2549^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 12817597 - 2³ = 12817589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12817591) 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 3 ways as a sum of consecutive naturals, for example, 492972 + ... + 492997.

It is an arithmetic number, because the mean of its divisors is an integer number (3450895).

Almost surely, 2^12817597 is an apocalyptic number.

It is an amenable number.

12817597 is a deficient number, since it is larger than the sum of its proper divisors (985983).

12817597 is an equidigital number, since it uses as much as digits as its factorization.

12817597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985982.

The product of its digits is 35280, while the sum is 40.

The square root of 12817597 is about 3580.1671748677. The cubic root of 12817597 is about 234.0285656801.

The spelling of 12817597 in words is "twelve million, eight hundred seventeen thousand, five hundred ninety-seven".