117217685 has 8 divisors (see below), whose sum is σ = 151481400. Its totient is φ = 86560704.

The previous prime is 117217679. The next prime is 117217687. The reversal of 117217685 is 586712711.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2149156 + 115068529 = 1466^2 + 10727^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117217685 - 2¹⁶ = 117152149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117217687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901610 + ... + 901739.

It is an arithmetic number, because the mean of its divisors is an integer number (18935175).

Almost surely, 2^117217685 is an apocalyptic number.

It is an amenable number.

117217685 is a deficient number, since it is larger than the sum of its proper divisors (34263715).

117217685 is a wasteful number, since it uses less digits than its factorization.

117217685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803367.

The product of its digits is 23520, while the sum is 38.

The square root of 117217685 is about 10826.7116429690. The cubic root of 117217685 is about 489.4004676386.

The spelling of 117217685 in words is "one hundred seventeen million, two hundred seventeen thousand, six hundred eighty-five".