9804000641 has 2 divisors, whose sum is σ = 9804000642. Its totient is φ = 9804000640.

The previous prime is 9804000637. The next prime is 9804000653. The reversal of 9804000641 is 1460004089.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9662890000 + 141110641 = 98300^2 + 11879^2 .

It is an emirp because it is prime and its reverse (1460004089) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9804000641 - 2² = 9804000637 is a prime.

It is a super-2 number, since 2×9804000641² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9804000598 and 9804000607.

It is not a weakly prime, because it can be changed into another prime (9804000601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4902000320 + 4902000321.

It is an arithmetic number, because the mean of its divisors is an integer number (4902000321).

Almost surely, 2^9804000641 is an apocalyptic number.

It is an amenable number.

9804000641 is a deficient number, since it is larger than the sum of its proper divisors (1).

9804000641 is an equidigital number, since it uses as much as digits as its factorization.

9804000641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 9804000641 is about 99015.1535927708. The cubic root of 9804000641 is about 2140.2661212270.

The spelling of 9804000641 in words is "nine billion, eight hundred four million, six hundred forty-one", and thus it is an aban number.