9091047018197 has 2 divisors, whose sum is σ = 9091047018198. Its totient is φ = 9091047018196.

The previous prime is 9091047018071. The next prime is 9091047018227. The reversal of 9091047018197 is 7918107401909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9048009856081 + 43037162116 = 3007991^2 + 207454^2 .

It is a cyclic number.

It is not a de Polignac number, because 9091047018197 - 2¹⁸ = 9091046756053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9091047017197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545523509098 + 4545523509099.

It is an arithmetic number, because the mean of its divisors is an integer number (4545523509099).

Almost surely, 2^{9091047018197} is an apocalyptic number.

It is an amenable number.

9091047018197 is a deficient number, since it is larger than the sum of its proper divisors (1).

9091047018197 is an equidigital number, since it uses as much as digits as its factorization.

9091047018197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 56.

The spelling of 9091047018197 in words is "nine trillion, ninety-one billion, forty-seven million, eighteen thousand, one hundred ninety-seven".