591 has 4 divisors (see below), whose sum is σ = 792. Its totient is φ = 392.

The previous prime is 587. The next prime is 593. The reversal of 591 is 195.

591 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 591 - 2^{2} = 587 is a prime.

It is a D-number.

591 is an undulating number in base 14.

591 is a lucky number.

It is a plaindrome in base 8, base 13 and base 16.

It is a nialpdrome in base 5.

It is a self number, because there is not a number *n* which added to its sum of digits gives 591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96 + ... + 101.

It is an arithmetic number, because the mean of its divisors is an integer number (198).

591 is a deficient number, since it is larger than the sum of its proper divisors (201).

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

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

The sum of its prime factors is 200.

The product of its digits is 45, while the sum is 15.

The square root of 591 is about 24.3104915623. The cubic root of 591 is about 8.3919423867.

Adding to 591 its sum of digits (15), we get a palindrome (606).

Subtracting from 591 its sum of digits (15), we obtain a square (576 = 24^{2}).

Adding to 591 its product of digits (45), we get a palindrome (636).

The spelling of 591 in words is "five hundred ninety-one", and thus it is an aban number.

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