9808398913 has 2 divisors, whose sum is σ = 9808398914. Its totient is φ = 9808398912.

The previous prime is 9808398851. The next prime is 9808398947. The reversal of 9808398913 is 3198938089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9360949504 + 447449409 = 96752^2 + 21153^2 .

It is a cyclic number.

It is not a de Polignac number, because 9808398913 - 2⁹ = 9808398401 is a prime.

It is not a weakly prime, because it can be changed into another prime (9808398713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4904199456 + 4904199457.

It is an arithmetic number, because the mean of its divisors is an integer number (4904199457).

Almost surely, 2^9808398913 is an apocalyptic number.

It is an amenable number.

9808398913 is a deficient number, since it is larger than the sum of its proper divisors (1).

9808398913 is an equidigital number, since it uses as much as digits as its factorization.

9808398913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 58.

The square root of 9808398913 is about 99037.3611976814. The cubic root of 9808398913 is about 2140.5861288633.

The spelling of 9808398913 in words is "nine billion, eight hundred eight million, three hundred ninety-eight thousand, nine hundred thirteen".