591591 has 32 divisors (see below), whose sum is σ = 1064448. Its totient is φ = 282240.

The previous prime is 591581. The next prime is 591599. The reversal of 591591 is 195195.

591591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 591591 - 2⁵ = 591559 is a prime.

It is a super-2 number, since 2×591591² = 699959822562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (591599) 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, 2905 + ... + 3101.

It is an arithmetic number, because the mean of its divisors is an integer number (33264).

2⁵⁹¹⁵⁹¹ is an apocalyptic number.

591591 is a deficient number, since it is larger than the sum of its proper divisors (472857).

591591 is a wasteful number, since it uses less digits than its factorization.

591591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231.

The product of its digits is 2025, while the sum is 30.

The square root of 591591 is about 769.1495303255. The cubic root of 591591 is about 83.9473876888.

It can be divided in two parts, 5915 and 91, that added together give a palindrome (6006).

The spelling of 591591 in words is "five hundred ninety-one thousand, five hundred ninety-one".