117806917 has 2 divisors, whose sum is σ = 117806918. Its totient is φ = 117806916.

The previous prime is 117806911. The next prime is 117806939. The reversal of 117806917 is 719608711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105966436 + 11840481 = 10294^2 + 3441^2 .

It is a cyclic number.

It is not a de Polignac number, because 117806917 - 2¹⁵ = 117774149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117806917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117806911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58903458 + 58903459.

It is an arithmetic number, because the mean of its divisors is an integer number (58903459).

Almost surely, 2^117806917 is an apocalyptic number.

It is an amenable number.

117806917 is a deficient number, since it is larger than the sum of its proper divisors (1).

117806917 is an equidigital number, since it uses as much as digits as its factorization.

117806917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 40.

The square root of 117806917 is about 10853.8894871838. The cubic root of 117806917 is about 490.2191397984.

The spelling of 117806917 in words is "one hundred seventeen million, eight hundred six thousand, nine hundred seventeen".