9890681 has 2 divisors, whose sum is σ = 9890682. Its totient is φ = 9890680.

The previous prime is 9890669. The next prime is 9890693. The reversal of 9890681 is 1860989.

It is a balanced prime because it is at equal distance from previous prime (9890669) and next prime (9890693).

It can be written as a sum of positive squares in only one way, i.e., 9554281 + 336400 = 3091^2 + 580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9890681 is a prime.

It is a super-2 number, since 2×9890681² = 195651141287522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9890081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4945340 + 4945341.

It is an arithmetic number, because the mean of its divisors is an integer number (4945341).

Almost surely, 2^9890681 is an apocalyptic number.

It is an amenable number.

9890681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9890681 is an equidigital number, since it uses as much as digits as its factorization.

9890681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 9890681 is about 3144.9453095404. The cubic root of 9890681 is about 214.6555219171.

The spelling of 9890681 in words is "nine million, eight hundred ninety thousand, six hundred eighty-one".