91168873 has 2 divisors, whose sum is σ = 91168874. Its totient is φ = 91168872.

The previous prime is 91168823. The next prime is 91168877. The reversal of 91168873 is 37886119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79798489 + 11370384 = 8933^2 + 3372^2 .

It is a cyclic number.

It is not a de Polignac number, because 91168873 - 2¹⁷ = 91037801 is a prime.

It is not a weakly prime, because it can be changed into another prime (91168877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45584436 + 45584437.

It is an arithmetic number, because the mean of its divisors is an integer number (45584437).

Almost surely, 2^91168873 is an apocalyptic number.

It is an amenable number.

91168873 is a deficient number, since it is larger than the sum of its proper divisors (1).

91168873 is an equidigital number, since it uses as much as digits as its factorization.

91168873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 91168873 is about 9548.2392617697. The cubic root of 91168873 is about 450.0722073430.

The spelling of 91168873 in words is "ninety-one million, one hundred sixty-eight thousand, eight hundred seventy-three".