871389 has 6 divisors (see below), whose sum is σ = 1258686. Its totient is φ = 580920.

The previous prime is 871349. The next prime is 871393. The reversal of 871389 is 983178.

It can be written as a sum of positive squares in only one way, i.e., 870489 + 900 = 933^2 + 30^2 .

It is not a de Polignac number, because 871389 - 2¹³ = 863197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871349) 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 5 ways as a sum of consecutive naturals, for example, 48402 + ... + 48419.

It is an arithmetic number, because the mean of its divisors is an integer number (209781).

2⁸⁷¹³⁸⁹ is an apocalyptic number.

It is an amenable number.

871389 is a deficient number, since it is larger than the sum of its proper divisors (387297).

871389 is a wasteful number, since it uses less digits than its factorization.

871389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96827 (or 96824 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 871389 is about 933.4821905103. The cubic root of 871389 is about 95.5148044993.

The spelling of 871389 in words is "eight hundred seventy-one thousand, three hundred eighty-nine".