91819536 has 40 divisors (see below), whose sum is σ = 237916320. Its totient is φ = 30514176.

The previous prime is 91819531. The next prime is 91819537. The reversal of 91819536 is 63591819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91819531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14235 + ... + 19653.

It is an arithmetic number, because the mean of its divisors is an integer number (5947908).

Almost surely, 2^91819536 is an apocalyptic number.

It is an amenable number.

91819536 is an abundant number, since it is smaller than the sum of its proper divisors (146096784).

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

91819536 is a wasteful number, since it uses less digits than its factorization.

91819536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5783 (or 5777 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 91819536 is about 9582.2510925147. The cubic root of 91819536 is about 451.1403767853.

The spelling of 91819536 in words is "ninety-one million, eight hundred nineteen thousand, five hundred thirty-six".