91040841 has 10 divisors (see below), whose sum is σ = 135999402. Its totient is φ = 60693840.

The previous prime is 91040827. The next prime is 91040861. The reversal of 91040841 is 14804019.

It can be written as a sum of positive squares in only one way, i.e., 91011600 + 29241 = 9540^2 + 171^2 .

It is not a de Polignac number, because 91040841 - 2⁶ = 91040777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (91040801) 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 in 9 ways as a sum of consecutive naturals, for example, 561900 + ... + 562061.

Almost surely, 2^91040841 is an apocalyptic number.

It is an amenable number.

91040841 is a deficient number, since it is larger than the sum of its proper divisors (44958561).

91040841 is a wasteful number, since it uses less digits than its factorization.

91040841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123973 (or 1123964 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 91040841 is about 9541.5324240921. The cubic root of 91040841 is about 449.8614239970.

The spelling of 91040841 in words is "ninety-one million, forty thousand, eight hundred forty-one".