9683689681 has 2 divisors, whose sum is σ = 9683689682. Its totient is φ = 9683689680.

The previous prime is 9683689669. The next prime is 9683689699. The reversal of 9683689681 is 1869863869.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9507225025 + 176464656 = 97505^2 + 13284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9683689681 is a prime.

It is a super-2 number, since 2×9683689681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9683689381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4841844840 + 4841844841.

It is an arithmetic number, because the mean of its divisors is an integer number (4841844841).

Almost surely, 2^9683689681 is an apocalyptic number.

It is an amenable number.

9683689681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9683689681 is an equidigital number, since it uses as much as digits as its factorization.

9683689681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26873856, while the sum is 64.

The square root of 9683689681 is about 98405.7400815623. The cubic root of 9683689681 is about 2131.4752195997.

The spelling of 9683689681 in words is "nine billion, six hundred eighty-three million, six hundred eighty-nine thousand, six hundred eighty-one".