9816641 has 2 divisors, whose sum is σ = 9816642. Its totient is φ = 9816640.

The previous prime is 9816637. The next prime is 9816647. The reversal of 9816641 is 1466189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9480241 + 336400 = 3079^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 9816641 - 2² = 9816637 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9816647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4908320 + 4908321.

It is an arithmetic number, because the mean of its divisors is an integer number (4908321).

Almost surely, 2^9816641 is an apocalyptic number.

It is an amenable number.

9816641 is a deficient number, since it is larger than the sum of its proper divisors (1).

9816641 is an equidigital number, since it uses as much as digits as its factorization.

9816641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 9816641 is about 3133.1519273728. The cubic root of 9816641 is about 214.1185545674.

The spelling of 9816641 in words is "nine million, eight hundred sixteen thousand, six hundred forty-one".