91136 has 22 divisors (see below), whose sum is σ = 184230. Its totient is φ = 45056.

The previous prime is 91129. The next prime is 91139. The reversal of 91136 is 63119.

It can be written as a sum of positive squares in only one way, i.e., 65536 + 25600 = 256^2 + 160^2 .

It is not an unprimeable number, because it can be changed into a prime (91139) by changing a digit.

91136 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980 + ... + 1068.

2⁹¹¹³⁶ 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 91136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92115).

91136 is an abundant number, since it is smaller than the sum of its proper divisors (93094).

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

91136 is an equidigital number, since it uses as much as digits as its factorization.

91136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 91 counting only the distinct ones).

The product of its digits is 162, while the sum is 20.

The square root of 91136 is about 301.8873962258. The cubic root of 91136 is about 45.0018106267.

It can be divided in two parts, 9113 and 6, that added together give a palindrome (9119).

The spelling of 91136 in words is "ninety-one thousand, one hundred thirty-six".