9681 has 8 divisors (see below), whose sum is σ = 14784. Its totient is φ = 5520.

The previous prime is 9679. The next prime is 9689. The reversal of 9681 is 1869.

9681 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 not a de Polignac number, because 9681 - 2¹ = 9679 is a prime.

It is a super-2 number, since 2×9681² = 187443522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210 + ... + 251.

It is an arithmetic number, because the mean of its divisors is an integer number (1848).

2⁹⁶⁸¹ is an apocalyptic number.

It is an amenable number.

9681 is a deficient number, since it is larger than the sum of its proper divisors (5103).

9681 is a wasteful number, since it uses less digits than its factorization.

9681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

The product of its digits is 432, while the sum is 24.

The square root of 9681 is about 98.3920728514. The cubic root of 9681 is about 21.3127785959.

It can be divided in two parts, 968 and 1, that added together give a palindrome (969).

The spelling of 9681 in words is "nine thousand, six hundred eighty-one".