117391117 has 2 divisors, whose sum is σ = 117391118. Its totient is φ = 117391116.

The previous prime is 117391111. The next prime is 117391129. The reversal of 117391117 is 711193711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114190596 + 3200521 = 10686^2 + 1789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117391117 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 (117391111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58695558 + 58695559.

It is an arithmetic number, because the mean of its divisors is an integer number (58695559).

Almost surely, 2^117391117 is an apocalyptic number.

It is an amenable number.

117391117 is a deficient number, since it is larger than the sum of its proper divisors (1).

117391117 is an equidigital number, since it uses as much as digits as its factorization.

117391117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1323, while the sum is 31.

The square root of 117391117 is about 10834.7181320051. The cubic root of 117391117 is about 489.6417164325.

The spelling of 117391117 in words is "one hundred seventeen million, three hundred ninety-one thousand, one hundred seventeen".