91161384 has 64 divisors (see below), whose sum is σ = 237211200. Its totient is φ = 29159424.

The previous prime is 91161349. The next prime is 91161401. The reversal of 91161384 is 48316119.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157704 + ... + 158280.

It is an arithmetic number, because the mean of its divisors is an integer number (3706425).

Almost surely, 2^91161384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91161384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118605600).

91161384 is an abundant number, since it is smaller than the sum of its proper divisors (146049816).

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

91161384 is a wasteful number, since it uses less digits than its factorization.

91161384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 838 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 91161384 is about 9547.8470871710. The cubic root of 91161384 is about 450.0598833887.

The spelling of 91161384 in words is "ninety-one million, one hundred sixty-one thousand, three hundred eighty-four".