12317381 has 2 divisors, whose sum is σ = 12317382. Its totient is φ = 12317380.

The previous prime is 12317353. The next prime is 12317407. The reversal of 12317381 is 18371321.

It is an a-pointer prime, because the next prime (12317407) can be obtained adding 12317381 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11730625 + 586756 = 3425^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 12317381 - 2⁶ = 12317317 is a prime.

It is a super-2 number, since 2×12317381² = 303435749398322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12317381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12317311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6158690 + 6158691.

It is an arithmetic number, because the mean of its divisors is an integer number (6158691).

Almost surely, 2^12317381 is an apocalyptic number.

It is an amenable number.

12317381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12317381 is an equidigital number, since it uses as much as digits as its factorization.

12317381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 12317381 is about 3509.6126566902. The cubic root of 12317381 is about 230.9437029779.

The spelling of 12317381 in words is "twelve million, three hundred seventeen thousand, three hundred eighty-one".