9891000227 has 2 divisors, whose sum is σ = 9891000228. Its totient is φ = 9891000226.

The previous prime is 9891000193. The next prime is 9891000239. The reversal of 9891000227 is 7220001989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9891000227 - 2²⁸ = 9622564771 is a prime.

It is not a weakly prime, because it can be changed into another prime (9891000257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4945500113 + 4945500114.

It is an arithmetic number, because the mean of its divisors is an integer number (4945500114).

Almost surely, 2^9891000227 is an apocalyptic number.

9891000227 is a deficient number, since it is larger than the sum of its proper divisors (1).

9891000227 is an equidigital number, since it uses as much as digits as its factorization.

9891000227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 9891000227 is about 99453.5078667414. The cubic root of 9891000227 is about 2146.5783126606.

The spelling of 9891000227 in words is "nine billion, eight hundred ninety-one million, two hundred twenty-seven", and thus it is an aban number.