117208785 has 16 divisors (see below), whose sum is σ = 192603456. Its totient is φ = 60821568.

The previous prime is 117208771. The next prime is 117208801. The reversal of 117208785 is 587802711.

It is not a de Polignac number, because 117208785 - 2⁴ = 117208769 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105039 + ... + 106148.

It is an arithmetic number, because the mean of its divisors is an integer number (12037716).

Almost surely, 2^117208785 is an apocalyptic number.

117208785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117208785 is a deficient number, since it is larger than the sum of its proper divisors (75394671).

117208785 is a wasteful number, since it uses less digits than its factorization.

117208785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211232.

The product of its (nonzero) digits is 31360, while the sum is 39.

The square root of 117208785 is about 10826.3006147068. The cubic root of 117208785 is about 489.3880810708.

The spelling of 117208785 in words is "one hundred seventeen million, two hundred eight thousand, seven hundred eighty-five".