9817997189 has 48 divisors (see below), whose sum is σ = 13781007744. Its totient is φ = 6754492800.

The previous prime is 9817997173. The next prime is 9817997201.

9817997189 is nontrivially palindromic in base 10.

9817997189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9817997189 - 2⁴ = 9817997173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9817997149) 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 in 47 ways as a sum of consecutive naturals, for example, 520259 + ... + 538799.

It is an arithmetic number, because the mean of its divisors is an integer number (287104328).

Almost surely, 2^9817997189 is an apocalyptic number.

It is an amenable number.

9817997189 is a deficient number, since it is larger than the sum of its proper divisors (3963010555).

9817997189 is a wasteful number, since it uses less digits than its factorization.

9817997189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18618 (or 18595 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 68.

The square root of 9817997189 is about 99085.8072026463. The cubic root of 9817997189 is about 2141.2841441853.

The spelling of 9817997189 in words is "nine billion, eight hundred seventeen million, nine hundred ninety-seven thousand, one hundred eighty-nine".