986985 has 20 divisors (see below), whose sum is σ = 1769988. Its totient is φ = 526176.

The previous prime is 986983. The next prime is 986989. The reversal of 986985 is 589689.

It can be written as a sum of positive squares in 2 ways, for example, as 685584 + 301401 = 828^2 + 549^2 .

It is not a de Polignac number, because 986985 - 2¹ = 986983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 986985.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 986985.

It is not an unprimeable number, because it can be changed into a prime (986981) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 814 + ... + 1623.

2⁹⁸⁶⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

986985 is a deficient number, since it is larger than the sum of its proper divisors (783003).

986985 is a wasteful number, since it uses less digits than its factorization.

986985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454 (or 2445 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 986985 is about 993.4711873024. The cubic root of 986985 is about 99.5642708251.

The spelling of 986985 in words is "nine hundred eighty-six thousand, nine hundred eighty-five".