87871 has 4 divisors (see below), whose sum is σ = 100432. Its totient is φ = 75312.

The previous prime is 87869. The next prime is 87877. The reversal of 87871 is 17878.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87871 - 2¹ = 87869 is a prime.

It is a Duffinian number.

87871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6270 + ... + 6283.

It is an arithmetic number, because the mean of its divisors is an integer number (25108).

2⁸⁷⁸⁷¹ is an apocalyptic number.

87871 is a deficient number, since it is larger than the sum of its proper divisors (12561).

87871 is a wasteful number, since it uses less digits than its factorization.

87871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12560.

The product of its digits is 3136, while the sum is 31.

The square root of 87871 is about 296.4304302868. The cubic root of 87871 is about 44.4578568316.

It can be divided in two parts, 878 and 71, that added together give a palindrome (949).

The spelling of 87871 in words is "eighty-seven thousand, eight hundred seventy-one".