91836 has 18 divisors (see below), whose sum is σ = 232232. Its totient is φ = 30600.

The previous prime is 91823. The next prime is 91837. The reversal of 91836 is 63819.

It is a tau number, because it is divible by the number of its divisors (18).

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91836.

It is not an unprimeable number, because it can be changed into a prime (91837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1240 + ... + 1311.

2⁹¹⁸³⁶ is an apocalyptic number.

It is an amenable number.

91836 is an abundant number, since it is smaller than the sum of its proper divisors (140396).

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

91836 is a wasteful number, since it uses less digits than its factorization.

91836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561 (or 2556 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 91836 is about 303.0445511802. The cubic root of 91836 is about 45.1167339570.

Subtracting from 91836 its sum of digits (27), we obtain a square (91809 = 303²).

The spelling of 91836 in words is "ninety-one thousand, eight hundred thirty-six".