871899 has 8 divisors (see below), whose sum is σ = 1328640. Its totient is φ = 498216.

The previous prime is 871883. The next prime is 871901. The reversal of 871899 is 998178.

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

It is not a de Polignac number, because 871899 - 2⁴ = 871883 is a prime.

871899 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 871899.

It is not an unprimeable number, because it can be changed into a prime (831899) 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 in 7 ways as a sum of consecutive naturals, for example, 20739 + ... + 20780.

It is an arithmetic number, because the mean of its divisors is an integer number (166080).

2⁸⁷¹⁸⁹⁹ is an apocalyptic number.

871899 is a deficient number, since it is larger than the sum of its proper divisors (456741).

871899 is a wasteful number, since it uses less digits than its factorization.

871899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41529.

The product of its digits is 36288, while the sum is 42.

The square root of 871899 is about 933.7553212700. The cubic root of 871899 is about 95.5334349273.

It can be divided in two parts, 871 and 899, that added together give a triangular number (1770 = T₅₉).

The spelling of 871899 in words is "eight hundred seventy-one thousand, eight hundred ninety-nine".