868856171 has 4 divisors (see below), whose sum is σ = 868935000. Its totient is φ = 868777344.

The previous prime is 868856167. The next prime is 868856173. The reversal of 868856171 is 171658868.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 868856171 - 2² = 868856167 is a prime.

It is a super-2 number, since 2×868856171² = 1509822091769562482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868856173) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19541 + ... + 46038.

It is an arithmetic number, because the mean of its divisors is an integer number (217233750).

Almost surely, 2^868856171 is an apocalyptic number.

868856171 is a deficient number, since it is larger than the sum of its proper divisors (78829).

868856171 is a wasteful number, since it uses less digits than its factorization.

868856171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78828.

The product of its digits is 645120, while the sum is 50.

The square root of 868856171 is about 29476.3663126919. The cubic root of 868856171 is about 954.2217176334.

The spelling of 868856171 in words is "eight hundred sixty-eight million, eight hundred fifty-six thousand, one hundred seventy-one".