117816705 has 24 divisors (see below), whose sum is σ = 211259880. Its totient is φ = 60668160.

The previous prime is 117816697. The next prime is 117816707. The reversal of 117816705 is 507618711.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14265729 + 103550976 = 3777^2 + 10176^2 .

It is not a de Polignac number, because 117816705 - 2³ = 117816697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117816705.

It is not an unprimeable number, because it can be changed into a prime (117816707) 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 in 23 ways as a sum of consecutive naturals, for example, 43836 + ... + 46445.

It is an arithmetic number, because the mean of its divisors is an integer number (8802495).

Almost surely, 2^117816705 is an apocalyptic number.

117816705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117816705 is a deficient number, since it is larger than the sum of its proper divisors (93443175).

117816705 is a wasteful number, since it uses less digits than its factorization.

117816705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90321 (or 90318 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 36.

The square root of 117816705 is about 10854.3403760892. The cubic root of 117816705 is about 490.2327160585.

The spelling of 117816705 in words is "one hundred seventeen million, eight hundred sixteen thousand, seven hundred five".