549365 has 4 divisors (see below), whose sum is σ = 659244. Its totient is φ = 439488.

The previous prime is 549331. The next prime is 549379. The reversal of 549365 is 563945.

It is a happy number.

549365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 128164 + 421201 = 358^2 + 649^2 .

It is a cyclic number.

It is not a de Polignac number, because 549365 - 2¹⁴ = 532981 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54932 + ... + 54941.

It is an arithmetic number, because the mean of its divisors is an integer number (164811).

549365 is a Friedman number, since it can be written as (49^3-6^5)*5, using all its digits and the basic arithmetic operations.

2⁵⁴⁹³⁶⁵ is an apocalyptic number.

It is an amenable number.

549365 is a deficient number, since it is larger than the sum of its proper divisors (109879).

549365 is a wasteful number, since it uses less digits than its factorization.

549365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109878.

The product of its digits is 16200, while the sum is 32.

The square root of 549365 is about 741.1916081554. The cubic root of 549365 is about 81.9005834625.

Adding to 549365 its product of digits (16200), we get a palindrome (565565).

The spelling of 549365 in words is "five hundred forty-nine thousand, three hundred sixty-five".