549589 has 2 divisors, whose sum is σ = 549590. Its totient is φ = 549588.

The previous prime is 549587. The next prime is 549607. The reversal of 549589 is 985945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483025 + 66564 = 695^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 549589 - 2¹ = 549587 is a prime.

Together with 549587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274794 + 274795.

It is an arithmetic number, because the mean of its divisors is an integer number (274795).

2⁵⁴⁹⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

549589 is a deficient number, since it is larger than the sum of its proper divisors (1).

549589 is an equidigital number, since it uses as much as digits as its factorization.

549589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 549589 is about 741.3427007801. The cubic root of 549589 is about 81.9117134264.

It can be divided in two parts, 5 and 49589, that added together give a palindrome (49594).

The spelling of 549589 in words is "five hundred forty-nine thousand, five hundred eighty-nine".