87089 has 4 divisors (see below), whose sum is σ = 88356. Its totient is φ = 85824.

The previous prime is 87083. The next prime is 87103. The reversal of 87089 is 98078.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47089 + 40000 = 217^2 + 200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87089 is a prime.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 87 and 89 contains 87089 itself.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 87089.

It is not an unprimeable number, because it can be changed into a prime (87083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524 + ... + 669.

It is an arithmetic number, because the mean of its divisors is an integer number (22089).

2⁸⁷⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

87089 is a deficient number, since it is larger than the sum of its proper divisors (1267).

87089 is a wasteful number, since it uses less digits than its factorization.

87089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 87089 is about 295.1084546400. The cubic root of 87089 is about 44.3255807701.

It can be divided in two parts, 870 and 89, that added together give a palindrome (959).

The spelling of 87089 in words is "eighty-seven thousand, eighty-nine".