91760881 has 2 divisors, whose sum is σ = 91760882. Its totient is φ = 91760880.

The previous prime is 91760863. The next prime is 91760909. The reversal of 91760881 is 18806719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86397025 + 5363856 = 9295^2 + 2316^2 .

It is an emirp because it is prime and its reverse (18806719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91760881 - 2⁹ = 91760369 is a prime.

It is a super-3 number, since 3×91760881³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (91260881) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45880440 + 45880441.

It is an arithmetic number, because the mean of its divisors is an integer number (45880441).

Almost surely, 2^91760881 is an apocalyptic number.

It is an amenable number.

91760881 is a deficient number, since it is larger than the sum of its proper divisors (1).

91760881 is an equidigital number, since it uses as much as digits as its factorization.

91760881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 91760881 is about 9579.1899970718. The cubic root of 91760881 is about 451.0442923840.

The spelling of 91760881 in words is "ninety-one million, seven hundred sixty thousand, eight hundred eighty-one".