117917 has 2 divisors, whose sum is σ = 117918. Its totient is φ = 117916.

The previous prime is 117911. The next prime is 117937. The reversal of 117917 is 719711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98596 + 19321 = 314^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 117917 - 2¹⁴ = 101533 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 (117911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58958 + 58959.

It is an arithmetic number, because the mean of its divisors is an integer number (58959).

2¹¹⁷⁹¹⁷ is an apocalyptic number.

It is an amenable number.

117917 is a deficient number, since it is larger than the sum of its proper divisors (1).

117917 is an equidigital number, since it uses as much as digits as its factorization.

117917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 441, while the sum is 26.

The square root of 117917 is about 343.3904483238. The cubic root of 117917 is about 49.0371785033.

The spelling of 117917 in words is "one hundred seventeen thousand, nine hundred seventeen".