117718085 has 4 divisors (see below), whose sum is σ = 141261708. Its totient is φ = 94174464.

The previous prime is 117718063. The next prime is 117718099. The reversal of 117718085 is 580817711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580817711 = 73 ⋅7956407.

It can be written as a sum of positive squares in 2 ways, for example, as 39413284 + 78304801 = 6278^2 + 8849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117718085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11771804 + ... + 11771813.

It is an arithmetic number, because the mean of its divisors is an integer number (35315427).

Almost surely, 2^117718085 is an apocalyptic number.

It is an amenable number.

117718085 is a deficient number, since it is larger than the sum of its proper divisors (23543623).

117718085 is an equidigital number, since it uses as much as digits as its factorization.

117718085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23543622.

The product of its (nonzero) digits is 15680, while the sum is 38.

The square root of 117718085 is about 10849.7965418712. The cubic root of 117718085 is about 490.0958926584.

The spelling of 117718085 in words is "one hundred seventeen million, seven hundred eighteen thousand, eighty-five".