87889 has 4 divisors (see below), whose sum is σ = 88560. Its totient is φ = 87220.

The previous prime is 87887. The next prime is 87911. The reversal of 87889 is 98878.

87889 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 87889 - 2¹ = 87887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87881) 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, 67 + ... + 424.

It is an arithmetic number, because the mean of its divisors is an integer number (22140).

2⁸⁷⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

87889 is a deficient number, since it is larger than the sum of its proper divisors (671).

87889 is a wasteful number, since it uses less digits than its factorization.

87889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670.

The product of its digits is 32256, while the sum is 40.

The square root of 87889 is about 296.4607899875. The cubic root of 87889 is about 44.4608922919.

The spelling of 87889 in words is "eighty-seven thousand, eight hundred eighty-nine".