87987 has 8 divisors (see below), whose sum is σ = 118720. Its totient is φ = 57960.

The previous prime is 87977. The next prime is 87991. The reversal of 87987 is 78978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87987 - 2¹² = 83891 is a prime.

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 87987.

It is not an unprimeable number, because it can be changed into a prime (87917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312 + ... + 522.

It is an arithmetic number, because the mean of its divisors is an integer number (14840).

2⁸⁷⁹⁸⁷ is an apocalyptic number.

87987 is a deficient number, since it is larger than the sum of its proper divisors (30733).

87987 is a wasteful number, since it uses less digits than its factorization.

87987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353.

The product of its digits is 28224, while the sum is 39.

The square root of 87987 is about 296.6260271790. The cubic root of 87987 is about 44.4774114201.

Subtracting from 87987 its reverse (78978), we obtain a palindrome (9009).

The spelling of 87987 in words is "eighty-seven thousand, nine hundred eighty-seven".