91684194 has 48 divisors (see below), whose sum is σ = 214524288. Its totient is φ = 26046048.

The previous prime is 91684189. The next prime is 91684237. The reversal of 91684194 is 49148619.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57127 + ... + 58709.

It is an arithmetic number, because the mean of its divisors is an integer number (4469256).

Almost surely, 2^91684194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91684194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107262144).

91684194 is an abundant number, since it is smaller than the sum of its proper divisors (122840094).

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

91684194 is a wasteful number, since it uses less digits than its factorization.

91684194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799 (or 1792 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 91684194 is about 9575.1863689434. The cubic root of 91684194 is about 450.9186074753.

The spelling of 91684194 in words is "ninety-one million, six hundred eighty-four thousand, one hundred ninety-four".