91041090 has 64 divisors (see below), whose sum is σ = 256483584. Its totient is φ = 20245248.

The previous prime is 91041089. The next prime is 91041091. The reversal of 91041090 is 9014019.

It is an interprime number because it is at equal distance from previous prime (91041089) and next prime (91041091).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91041090.

It is not an unprimeable number, because it can be changed into a prime (91041091) 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 31 ways as a sum of consecutive naturals, for example, 1912 + ... + 13628.

It is an arithmetic number, because the mean of its divisors is an integer number (4007556).

Almost surely, 2^91041090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91041090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128241792).

91041090 is an abundant number, since it is smaller than the sum of its proper divisors (165442494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91041090 is a wasteful number, since it uses less digits than its factorization.

91041090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11771.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 91041090 is about 9541.5454723016. The cubic root of 91041090 is about 449.8618341258.

The spelling of 91041090 in words is "ninety-one million, forty-one thousand, ninety".