117881117 has 2 divisors, whose sum is σ = 117881118. Its totient is φ = 117881116.

The previous prime is 117881089. The next prime is 117881161. The reversal of 117881117 is 711188711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101324356 + 16556761 = 10066^2 + 4069^2 .

It is a cyclic number.

It is not a de Polignac number, because 117881117 - 2¹² = 117877021 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 (117881177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58940558 + 58940559.

It is an arithmetic number, because the mean of its divisors is an integer number (58940559).

Almost surely, 2^117881117 is an apocalyptic number.

It is an amenable number.

117881117 is a deficient number, since it is larger than the sum of its proper divisors (1).

117881117 is an equidigital number, since it uses as much as digits as its factorization.

117881117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3136, while the sum is 35.

The square root of 117881117 is about 10857.3070786452. The cubic root of 117881117 is about 490.3220387539.

The spelling of 117881117 in words is "one hundred seventeen million, eight hundred eighty-one thousand, one hundred seventeen".