489591 has 8 divisors (see below), whose sum is σ = 725360. Its totient is φ = 326376.

The previous prime is 489571. The next prime is 489613. The reversal of 489591 is 195984.

489591 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 489591 - 2¹⁰ = 488567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9040 + ... + 9093.

It is an arithmetic number, because the mean of its divisors is an integer number (90670).

2⁴⁸⁹⁵⁹¹ is an apocalyptic number.

489591 is a deficient number, since it is larger than the sum of its proper divisors (235769).

489591 is a wasteful number, since it uses less digits than its factorization.

489591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18142 (or 18136 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 489591 is about 699.7077961549. The cubic root of 489591 is about 78.8154105070.

Subtracting from 489591 its sum of digits (36), we obtain a triangular number (489555 = T₉₈₉).

The spelling of 489591 in words is "four hundred eighty-nine thousand, five hundred ninety-one".