868686871 has 12 divisors (see below), whose sum is σ = 942469032. Its totient is φ = 800313696.

The previous prime is 868686869. The next prime is 868686877. The reversal of 868686871 is 178686868.

It is not a de Polignac number, because 868686871 - 2¹ = 868686869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868686877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87745 + ... + 97141.

It is an arithmetic number, because the mean of its divisors is an integer number (78539086).

Almost surely, 2^868686871 is an apocalyptic number.

868686871 is a deficient number, since it is larger than the sum of its proper divisors (73782161).

868686871 is a wasteful number, since it uses less digits than its factorization.

868686871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9970 (or 9957 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 58.

The square root of 868686871 is about 29473.4943805447. The cubic root of 868686871 is about 954.1597356713.

It can be divided in two parts, 86868 and 6871, that added together give a palindrome (93739).

The spelling of 868686871 in words is "eight hundred sixty-eight million, six hundred eighty-six thousand, eight hundred seventy-one".