87985 has 4 divisors (see below), whose sum is σ = 105588. Its totient is φ = 70384.

The previous prime is 87977. The next prime is 87991. The reversal of 87985 is 58978.

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 13456 + 74529 = 116^2 + 273^2 .

It is a cyclic number.

It is not a de Polignac number, because 87985 - 2³ = 87977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8794 + ... + 8803.

It is an arithmetic number, because the mean of its divisors is an integer number (26397).

2⁸⁷⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

87985 is a deficient number, since it is larger than the sum of its proper divisors (17603).

87985 is a wasteful number, since it uses less digits than its factorization.

87985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17602.

The product of its digits is 20160, while the sum is 37.

The square root of 87985 is about 296.6226559115. The cubic root of 87985 is about 44.4770744177.

The spelling of 87985 in words is "eighty-seven thousand, nine hundred eighty-five".