91820000227 has 2 divisors, whose sum is σ = 91820000228. Its totient is φ = 91820000226.

The previous prime is 91820000203. The next prime is 91820000231. The reversal of 91820000227 is 72200002819.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91820000227 - 2¹⁹ = 91819475939 is a prime.

It is not a weakly prime, because it can be changed into another prime (91820000257) 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, 45910000113 + 45910000114.

It is an arithmetic number, because the mean of its divisors is an integer number (45910000114).

Almost surely, 2^91820000227 is an apocalyptic number.

91820000227 is a deficient number, since it is larger than the sum of its proper divisors (1).

91820000227 is an equidigital number, since it uses as much as digits as its factorization.

91820000227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 91820000227 in words is "ninety-one billion, eight hundred twenty million, two hundred twenty-seven", and thus it is an aban number.