91816794 has 64 divisors (see below), whose sum is σ = 211438080. Its totient is φ = 29514240.

The previous prime is 91816787. The next prime is 91816817. The reversal of 91816794 is 49761819.

It is a happy 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 31 ways as a sum of consecutive naturals, for example, 249999 + ... + 250365.

It is an arithmetic number, because the mean of its divisors is an integer number (3303720).

Almost surely, 2^91816794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91816794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105719040).

91816794 is an abundant number, since it is smaller than the sum of its proper divisors (119621286).

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

91816794 is a wasteful number, since it uses less digits than its factorization.

91816794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 526 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 91816794 is about 9582.1080144194. The cubic root of 91816794 is about 451.1358859500.

The spelling of 91816794 in words is "ninety-one million, eight hundred sixteen thousand, seven hundred ninety-four".