985987 has 8 divisors (see below), whose sum is σ = 1039104. Its totient is φ = 933768.

The previous prime is 985981. The next prime is 985991. The reversal of 985987 is 789589.

985987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 985987 - 2³ = 985979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3618 + ... + 3880.

It is an arithmetic number, because the mean of its divisors is an integer number (129888).

2⁹⁸⁵⁹⁸⁷ is an apocalyptic number.

985987 is a deficient number, since it is larger than the sum of its proper divisors (53117).

985987 is a wasteful number, since it uses less digits than its factorization.

985987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its digits is 181440, while the sum is 46.

The square root of 985987 is about 992.9687809795. The cubic root of 985987 is about 99.5307010301.

The spelling of 985987 in words is "nine hundred eighty-five thousand, nine hundred eighty-seven".