91345506 has 48 divisors (see below), whose sum is σ = 214967520. Its totient is φ = 25798080.

The previous prime is 91345477. The next prime is 91345531. The reversal of 91345506 is 60554319.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 24421 + ... + 27911.

It is an arithmetic number, because the mean of its divisors is an integer number (4478490).

Almost surely, 2^91345506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91345506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107483760).

91345506 is an abundant number, since it is smaller than the sum of its proper divisors (123622014).

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

91345506 is a wasteful number, since it uses less digits than its factorization.

91345506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599 (or 3592 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 91345506 is about 9557.4842924276. The cubic root of 91345506 is about 450.3626804563.

The spelling of 91345506 in words is "ninety-one million, three hundred forty-five thousand, five hundred six".