549423 has 48 divisors (see below), whose sum is σ = 1048320. Its totient is φ = 279936.

The previous prime is 549421. The next prime is 549431. The reversal of 549423 is 324945.

It is not a de Polignac number, because 549423 - 2¹ = 549421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

549423 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28908 + ... + 28926.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2⁵⁴⁹⁴²³ is an apocalyptic number.

549423 is a deficient number, since it is larger than the sum of its proper divisors (498897).

549423 is a wasteful number, since it uses less digits than its factorization.

549423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58 (or 46 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 549423 is about 741.2307333078. The cubic root of 549423 is about 81.9034656184.

It can be divided in two parts, 54942 and 3, that added together give a palindrome (54945).

The spelling of 549423 in words is "five hundred forty-nine thousand, four hundred twenty-three".