9809643197 has 2 divisors, whose sum is σ = 9809643198. Its totient is φ = 9809643196.

The previous prime is 9809643163. The next prime is 9809643251. The reversal of 9809643197 is 7913469089.

9809643197 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., 7798479481 + 2011163716 = 88309^2 + 44846^2 .

It is a cyclic number.

It is not a de Polignac number, because 9809643197 - 2¹⁸ = 9809381053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9809643157) 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, 4904821598 + 4904821599.

It is an arithmetic number, because the mean of its divisors is an integer number (4904821599).

Almost surely, 2^9809643197 is an apocalyptic number.

It is an amenable number.

9809643197 is a deficient number, since it is larger than the sum of its proper divisors (1).

9809643197 is an equidigital number, since it uses as much as digits as its factorization.

9809643197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The square root of 9809643197 is about 99043.6428903945. The cubic root of 9809643197 is about 2140.6766425979.

The spelling of 9809643197 in words is "nine billion, eight hundred nine million, six hundred forty-three thousand, one hundred ninety-seven".