117912317 has 2 divisors, whose sum is σ = 117912318. Its totient is φ = 117912316.

The previous prime is 117912307. The next prime is 117912337. The reversal of 117912317 is 713219711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108388921 + 9523396 = 10411^2 + 3086^2 .

It is an emirp because it is prime and its reverse (713219711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117912317 - 2⁸ = 117912061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117912307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58956158 + 58956159.

It is an arithmetic number, because the mean of its divisors is an integer number (58956159).

Almost surely, 2^117912317 is an apocalyptic number.

It is an amenable number.

117912317 is a deficient number, since it is larger than the sum of its proper divisors (1).

117912317 is an equidigital number, since it uses as much as digits as its factorization.

117912317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 32.

The square root of 117912317 is about 10858.7438039582. The cubic root of 117912317 is about 490.3652933439.

The spelling of 117912317 in words is "one hundred seventeen million, nine hundred twelve thousand, three hundred seventeen".