12312317 has 4 divisors (see below), whose sum is σ = 12395100. Its totient is φ = 12229536.

The previous prime is 12312283. The next prime is 12312331. The reversal of 12312317 is 71321321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71321321 = 23 ⋅3100927.

It can be written as a sum of positive squares in 2 ways, for example, as 4280761 + 8031556 = 2069^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312317 - 2¹⁸ = 12050173 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 (12312347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41168 + ... + 41465.

It is an arithmetic number, because the mean of its divisors is an integer number (3098775).

Almost surely, 2^12312317 is an apocalyptic number.

It is an amenable number.

12312317 is a deficient number, since it is larger than the sum of its proper divisors (82783).

12312317 is an equidigital number, since it uses as much as digits as its factorization.

12312317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82782.

The product of its digits is 252, while the sum is 20.

The square root of 12312317 is about 3508.8911353874. The cubic root of 12312317 is about 230.9120496251.

Adding to 12312317 its reverse (71321321), we get a palindrome (83633638).

The spelling of 12312317 in words is "twelve million, three hundred twelve thousand, three hundred seventeen".