91108841 has 2 divisors, whose sum is σ = 91108842. Its totient is φ = 91108840.

The previous prime is 91108817. The next prime is 91108861. The reversal of 91108841 is 14880119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54760000 + 36348841 = 7400^2 + 6029^2 .

It is an emirp because it is prime and its reverse (14880119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91108841 - 2¹⁰ = 91107817 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91108798 and 91108807.

It is not a weakly prime, because it can be changed into another prime (91108861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45554420 + 45554421.

It is an arithmetic number, because the mean of its divisors is an integer number (45554421).

Almost surely, 2^91108841 is an apocalyptic number.

It is an amenable number.

91108841 is a deficient number, since it is larger than the sum of its proper divisors (1).

91108841 is an equidigital number, since it uses as much as digits as its factorization.

91108841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 91108841 is about 9545.0951278654. The cubic root of 91108841 is about 449.9733992506.

The spelling of 91108841 in words is "ninety-one million, one hundred eight thousand, eight hundred forty-one".