91083636 has 96 divisors (see below), whose sum is σ = 271631360. Its totient is φ = 25855200.

The previous prime is 91083631. The next prime is 91083647. The reversal of 91083636 is 63638019.

It is a happy number.

91083636 is a `hidden beast` number, since 9 + 10 + 8 + 3 + 636 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 91083636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91083631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159231 + ... + 159801.

Almost surely, 2^91083636 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 91083636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135815680).

91083636 is an abundant number, since it is smaller than the sum of its proper divisors (180547724).

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

91083636 is a wasteful number, since it uses less digits than its factorization.

91083636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 91083636 is about 9543.7747249189. The cubic root of 91083636 is about 449.9319008061.

It can be divided in two parts, 91083 and 636, that added together give a palindrome (91719).

The spelling of 91083636 in words is "ninety-one million, eighty-three thousand, six hundred thirty-six".