986681 has 4 divisors (see below), whose sum is σ = 990864. Its totient is φ = 982500.

The previous prime is 986659. The next prime is 986693. The reversal of 986681 is 186689.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 986681 - 2⁶ = 986617 is a prime.

It is a super-2 number, since 2×986681² = 1947078791522, which contains 22 as substring.

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 986681.

It is not an unprimeable number, because it can be changed into a prime (986641) 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 3 ways as a sum of consecutive naturals, for example, 1715 + ... + 2216.

It is an arithmetic number, because the mean of its divisors is an integer number (247716).

2⁹⁸⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

986681 is a deficient number, since it is larger than the sum of its proper divisors (4183).

986681 is a wasteful number, since it uses less digits than its factorization.

986681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4182.

The product of its digits is 20736, while the sum is 38.

The square root of 986681 is about 993.3181766181. The cubic root of 986681 is about 99.5540475538.

The spelling of 986681 in words is "nine hundred eighty-six thousand, six hundred eighty-one".