986987 has 4 divisors (see below), whose sum is σ = 989016. Its totient is φ = 984960.

The previous prime is 986983. The next prime is 986989. The reversal of 986987 is 789689.

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

It is a cyclic number.

It is not a de Polignac number, because 986987 - 2² = 986983 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 986987.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203 + ... + 1419.

It is an arithmetic number, because the mean of its divisors is an integer number (247254).

2⁹⁸⁶⁹⁸⁷ is an apocalyptic number.

986987 is a deficient number, since it is larger than the sum of its proper divisors (2029).

986987 is a wasteful number, since it uses less digits than its factorization.

986987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028.

The product of its digits is 217728, while the sum is 47.

The square root of 986987 is about 993.4721938736. The cubic root of 986987 is about 99.5643380765.

The spelling of 986987 in words is "nine hundred eighty-six thousand, nine hundred eighty-seven".