12309317 has 2 divisors, whose sum is σ = 12309318. Its totient is φ = 12309316.

The previous prime is 12309299. The next prime is 12309361. The reversal of 12309317 is 71390321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11792356 + 516961 = 3434^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 12309317 - 2¹² = 12305221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12302317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6154658 + 6154659.

It is an arithmetic number, because the mean of its divisors is an integer number (6154659).

Almost surely, 2^12309317 is an apocalyptic number.

It is an amenable number.

12309317 is a deficient number, since it is larger than the sum of its proper divisors (1).

12309317 is an equidigital number, since it uses as much as digits as its factorization.

12309317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 12309317 is about 3508.4636238673. The cubic root of 12309317 is about 230.8932935448.

Adding to 12309317 its reverse (71390321), we get a palindrome (83699638).

The spelling of 12309317 in words is "twelve million, three hundred nine thousand, three hundred seventeen".