84891 has 4 divisors (see below), whose sum is σ = 113192. Its totient is φ = 56592.

The previous prime is 84871. The next prime is 84913. The reversal of 84891 is 19848.

It is a happy number.

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

It is not a de Polignac number, because 84891 - 2⁵ = 84859 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84811) 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, 14146 + ... + 14151.

It is an arithmetic number, because the mean of its divisors is an integer number (28298).

2⁸⁴⁸⁹¹ is an apocalyptic number.

84891 is a deficient number, since it is larger than the sum of its proper divisors (28301).

84891 is a wasteful number, since it uses less digits than its factorization.

84891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28300.

The product of its digits is 2304, while the sum is 30.

The square root of 84891 is about 291.3606013173. The cubic root of 84891 is about 43.9494943907.

It can be divided in two parts, 848 and 91, that added together give a palindrome (939).

The spelling of 84891 in words is "eighty-four thousand, eight hundred ninety-one".