12440317 has 2 divisors, whose sum is σ = 12440318. Its totient is φ = 12440316.

The previous prime is 12440293. The next prime is 12440339. The reversal of 12440317 is 71304421.

12440317 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (12440339) can be obtained adding 12440317 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11758041 + 682276 = 3429^2 + 826^2 .

It is a cyclic number.

It is not a de Polignac number, because 12440317 - 2¹¹ = 12438269 is a prime.

It is a super-2 number, since 2×12440317² = 309522974120978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220158 + 6220159.

It is an arithmetic number, because the mean of its divisors is an integer number (6220159).

Almost surely, 2^12440317 is an apocalyptic number.

It is an amenable number.

12440317 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440317 is an equidigital number, since it uses as much as digits as its factorization.

12440317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 12440317 is about 3527.0833559756. The cubic root of 12440317 is about 231.7094869924.

Adding to 12440317 its reverse (71304421), we get a palindrome (83744738).

The spelling of 12440317 in words is "twelve million, four hundred forty thousand, three hundred seventeen".