36591 has 4 divisors (see below), whose sum is σ = 48792. Its totient is φ = 24392.

The previous prime is 36587. The next prime is 36599. The reversal of 36591 is 19563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19563 = 3 ⋅6521.

It is a cyclic number.

It is not a de Polignac number, because 36591 - 2² = 36587 is a prime.

It is a D-number.

It is a plaindrome in 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 36591.

It is not an unprimeable number, because it can be changed into a prime (36599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6096 + ... + 6101.

It is an arithmetic number, because the mean of its divisors is an integer number (12198).

2³⁶⁵⁹¹ is an apocalyptic number.

36591 is a deficient number, since it is larger than the sum of its proper divisors (12201).

36591 is a wasteful number, since it uses less digits than its factorization.

36591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12200.

The product of its digits is 810, while the sum is 24.

The square root of 36591 is about 191.2877413741. The cubic root of 36591 is about 33.1989814368.

Adding to 36591 its product of digits (810), we get a triangular number (37401 = T₂₇₃).

The spelling of 36591 in words is "thirty-six thousand, five hundred ninety-one".