865852117 has 8 divisors (see below), whose sum is σ = 947743160. Its totient is φ = 786144960.

The previous prime is 865852061. The next prime is 865852121. The reversal of 865852117 is 711258568.

It can be written as a sum of positive squares in 4 ways, for example, as 174477681 + 691374436 = 13209^2 + 26294^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865852117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865852147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545142 + ... + 546727.

It is an arithmetic number, because the mean of its divisors is an integer number (118467895).

Almost surely, 2^865852117 is an apocalyptic number.

It is an amenable number.

865852117 is a deficient number, since it is larger than the sum of its proper divisors (81891043).

865852117 is a wasteful number, since it uses less digits than its factorization.

865852117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091943.

The product of its digits is 134400, while the sum is 43.

The square root of 865852117 is about 29425.3651973939. The cubic root of 865852117 is about 953.1207131610.

The spelling of 865852117 in words is "eight hundred sixty-five million, eight hundred fifty-two thousand, one hundred seventeen".