9898404401 has 2 divisors, whose sum is σ = 9898404402. Its totient is φ = 9898404400.

The previous prime is 9898404389. The next prime is 9898404427. The reversal of 9898404401 is 1044048989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8520213025 + 1378191376 = 92305^2 + 37124^2 .

It is an emirp because it is prime and its reverse (1044048989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9898404401 - 2¹⁰ = 9898403377 is a prime.

It is not a weakly prime, because it can be changed into another prime (9898404001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949202200 + 4949202201.

It is an arithmetic number, because the mean of its divisors is an integer number (4949202201).

Almost surely, 2^9898404401 is an apocalyptic number.

It is an amenable number.

9898404401 is a deficient number, since it is larger than the sum of its proper divisors (1).

9898404401 is an equidigital number, since it uses as much as digits as its factorization.

9898404401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 9898404401 is about 99490.7252008950. The cubic root of 9898404401 is about 2147.1138053558.

The spelling of 9898404401 in words is "nine billion, eight hundred ninety-eight million, four hundred four thousand, four hundred one".