9680198509 has 2 divisors, whose sum is σ = 9680198510. Its totient is φ = 9680198508.

The previous prime is 9680198491. The next prime is 9680198557. The reversal of 9680198509 is 9058910869.

9680198509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9161361225 + 518837284 = 95715^2 + 22778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9680198509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9680198509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9680198309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4840099254 + 4840099255.

It is an arithmetic number, because the mean of its divisors is an integer number (4840099255).

Almost surely, 2^9680198509 is an apocalyptic number.

It is an amenable number.

9680198509 is a deficient number, since it is larger than the sum of its proper divisors (1).

9680198509 is an equidigital number, since it uses as much as digits as its factorization.

9680198509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 55.

The square root of 9680198509 is about 98387.9998221328. Note that the first 3 decimals coincide. The cubic root of 9680198509 is about 2131.2190417280.

The spelling of 9680198509 in words is "nine billion, six hundred eighty million, one hundred ninety-eight thousand, five hundred nine".