91085273 has 2 divisors, whose sum is σ = 91085274. Its totient is φ = 91085272.

The previous prime is 91085263. The next prime is 91085299. The reversal of 91085273 is 37258019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74787904 + 16297369 = 8648^2 + 4037^2 .

It is a cyclic number.

It is not a de Polignac number, because 91085273 - 2⁴ = 91085257 is a prime.

It is not a weakly prime, because it can be changed into another prime (91085213) 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, 45542636 + 45542637.

It is an arithmetic number, because the mean of its divisors is an integer number (45542637).

Almost surely, 2^91085273 is an apocalyptic number.

It is an amenable number.

91085273 is a deficient number, since it is larger than the sum of its proper divisors (1).

91085273 is an equidigital number, since it uses as much as digits as its factorization.

91085273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 91085273 is about 9543.8604872452. The cubic root of 91085273 is about 449.9345962559.

The spelling of 91085273 in words is "ninety-one million, eighty-five thousand, two hundred seventy-three".