9891000193 has 2 divisors, whose sum is σ = 9891000194. Its totient is φ = 9891000192.

The previous prime is 9891000167. The next prime is 9891000227. The reversal of 9891000193 is 3910001989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9398914704 + 492085489 = 96948^2 + 22183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9891000193 is a prime.

It is not a weakly prime, because it can be changed into another prime (9891000143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4945500096 + 4945500097.

It is an arithmetic number, because the mean of its divisors is an integer number (4945500097).

Almost surely, 2^9891000193 is an apocalyptic number.

It is an amenable number.

9891000193 is a deficient number, since it is larger than the sum of its proper divisors (1).

9891000193 is an equidigital number, since it uses as much as digits as its factorization.

9891000193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 9891000193 is about 99453.5076958073. The cubic root of 9891000193 is about 2146.5783102010.

The spelling of 9891000193 in words is "nine billion, eight hundred ninety-one million, one hundred ninety-three", and thus it is an aban number.