9728681 has 2 divisors, whose sum is σ = 9728682. Its totient is φ = 9728680.

The previous prime is 9728651. The next prime is 9728729. The reversal of 9728681 is 1868279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4910656 + 4818025 = 2216^2 + 2195^2 .

It is a cyclic number.

It is not a de Polignac number, because 9728681 - 2⁶ = 9728617 is a prime.

It is a super-2 number, since 2×9728681² = 189294467999522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9728611) 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 as a sum of consecutive naturals, namely, 4864340 + 4864341.

It is an arithmetic number, because the mean of its divisors is an integer number (4864341).

Almost surely, 2^9728681 is an apocalyptic number.

It is an amenable number.

9728681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728681 is an equidigital number, since it uses as much as digits as its factorization.

9728681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 9728681 is about 3119.0833589374. The cubic root of 9728681 is about 213.4771130905.

The spelling of 9728681 in words is "nine million, seven hundred twenty-eight thousand, six hundred eighty-one".