11661317 has 2 divisors, whose sum is σ = 11661318. Its totient is φ = 11661316.

The previous prime is 11661289. The next prime is 11661319. The reversal of 11661317 is 71316611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7392961 + 4268356 = 2719^2 + 2066^2 .

It is an emirp because it is prime and its reverse (71316611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11661317 - 2⁸ = 11661061 is a prime.

Together with 11661319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11661319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830658 + 5830659.

It is an arithmetic number, because the mean of its divisors is an integer number (5830659).

Almost surely, 2^11661317 is an apocalyptic number.

It is an amenable number.

11661317 is a deficient number, since it is larger than the sum of its proper divisors (1).

11661317 is an equidigital number, since it uses as much as digits as its factorization.

11661317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 26.

The square root of 11661317 is about 3414.8670545133. The cubic root of 11661317 is about 226.7683989224.

Adding to 11661317 its reverse (71316611), we get a palindrome (82977928).

The spelling of 11661317 in words is "eleven million, six hundred sixty-one thousand, three hundred seventeen".