11981317 has 2 divisors, whose sum is σ = 11981318. Its totient is φ = 11981316.

The previous prime is 11981297. The next prime is 11981329. The reversal of 11981317 is 71318911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7650756 + 4330561 = 2766^2 + 2081^2 .

It is an emirp because it is prime and its reverse (71318911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11981317 - 2¹¹ = 11979269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11981357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5990658 + 5990659.

It is an arithmetic number, because the mean of its divisors is an integer number (5990659).

Almost surely, 2^11981317 is an apocalyptic number.

It is an amenable number.

11981317 is a deficient number, since it is larger than the sum of its proper divisors (1).

11981317 is an equidigital number, since it uses as much as digits as its factorization.

11981317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 31.

The square root of 11981317 is about 3461.4039059318. The cubic root of 11981317 is about 228.8239718167.

The spelling of 11981317 in words is "eleven million, nine hundred eighty-one thousand, three hundred seventeen".