867871 has 2 divisors, whose sum is σ = 867872. Its totient is φ = 867870.

The previous prime is 867857. The next prime is 867887. The reversal of 867871 is 178768.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 867871 - 2⁷ = 867743 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 867871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (867271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433935 + 433936.

It is an arithmetic number, because the mean of its divisors is an integer number (433936).

2⁸⁶⁷⁸⁷¹ is an apocalyptic number.

867871 is a deficient number, since it is larger than the sum of its proper divisors (1).

867871 is an equidigital number, since it uses as much as digits as its factorization.

867871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 37.

The square root of 867871 is about 931.5959424557. The cubic root of 867871 is about 95.3860926390.

The spelling of 867871 in words is "eight hundred sixty-seven thousand, eight hundred seventy-one".