9783681 has 8 divisors (see below), whose sum is σ = 13191840. Its totient is φ = 6448992.

The previous prime is 9783677. The next prime is 9783703. The reversal of 9783681 is 1863879.

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

It is not a de Polignac number, because 9783681 - 2² = 9783677 is a prime.

It is a super-2 number, since 2×9783681² = 191440827819522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

9783681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9783601) 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, 18055 + ... + 18588.

It is an arithmetic number, because the mean of its divisors is an integer number (1648980).

Almost surely, 2^9783681 is an apocalyptic number.

It is an amenable number.

9783681 is a deficient number, since it is larger than the sum of its proper divisors (3408159).

9783681 is a wasteful number, since it uses less digits than its factorization.

9783681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36735.

The product of its digits is 72576, while the sum is 42.

The square root of 9783681 is about 3127.8876258587. The cubic root of 9783681 is about 213.8786469512.

The spelling of 9783681 in words is "nine million, seven hundred eighty-three thousand, six hundred eighty-one".