91073771 has 2 divisors, whose sum is σ = 91073772. Its totient is φ = 91073770.

The previous prime is 91073747. The next prime is 91073791. The reversal of 91073771 is 17737019.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (17737019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91073771 - 2¹⁰ = 91072747 is a prime.

It is not a weakly prime, because it can be changed into another prime (91073701) 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, 45536885 + 45536886.

It is an arithmetic number, because the mean of its divisors is an integer number (45536886).

Almost surely, 2^91073771 is an apocalyptic number.

91073771 is a deficient number, since it is larger than the sum of its proper divisors (1).

91073771 is an equidigital number, since it uses as much as digits as its factorization.

91073771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9261, while the sum is 35.

The square root of 91073771 is about 9543.2578818766. The cubic root of 91073771 is about 449.9156566205.

The spelling of 91073771 in words is "ninety-one million, seventy-three thousand, seven hundred seventy-one".