91740340385273 has 2 divisors, whose sum is σ = 91740340385274. Its totient is φ = 91740340385272.

The previous prime is 91740340385237. The next prime is 91740340385297. The reversal of 91740340385273 is 37258304304719.

Together with previous prime (91740340385237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76254163563769 + 15486176821504 = 8732363^2 + 3935248^2 .

It is a cyclic number.

It is not a de Polignac number, because 91740340385273 - 2⁶ = 91740340385209 is a prime.

It is not a weakly prime, because it can be changed into another prime (91740340381273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45870170192636 + 45870170192637.

It is an arithmetic number, because the mean of its divisors is an integer number (45870170192637).

Almost surely, 2^{91740340385273} is an apocalyptic number.

It is an amenable number.

91740340385273 is a deficient number, since it is larger than the sum of its proper divisors (1).

91740340385273 is an equidigital number, since it uses as much as digits as its factorization.

91740340385273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 91740340385273 in words is "ninety-one trillion, seven hundred forty billion, three hundred forty million, three hundred eighty-five thousand, two hundred seventy-three".