117317909 has 2 divisors, whose sum is σ = 117317910. Its totient is φ = 117317908.

The previous prime is 117317891. The next prime is 117317929. The reversal of 117317909 is 909713711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94517284 + 22800625 = 9722^2 + 4775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117317909 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 (117317929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58658954 + 58658955.

It is an arithmetic number, because the mean of its divisors is an integer number (58658955).

Almost surely, 2^117317909 is an apocalyptic number.

It is an amenable number.

117317909 is a deficient number, since it is larger than the sum of its proper divisors (1).

117317909 is an equidigital number, since it uses as much as digits as its factorization.

117317909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 38.

The square root of 117317909 is about 10831.3392062108. The cubic root of 117317909 is about 489.5399110441.

The spelling of 117317909 in words is "one hundred seventeen million, three hundred seventeen thousand, nine hundred nine".