549361 has 4 divisors (see below), whose sum is σ = 551412. Its totient is φ = 547312.

The previous prime is 549331. The next prime is 549379. The reversal of 549361 is 163945.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163945 = 5 ⋅32789.

It can be written as a sum of positive squares in 2 ways, for example, as 119025 + 430336 = 345^2 + 656^2 .

It is a cyclic number.

It is not a de Polignac number, because 549361 - 2¹⁷ = 418289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550 + ... + 1183.

It is an arithmetic number, because the mean of its divisors is an integer number (137853).

2⁵⁴⁹³⁶¹ is an apocalyptic number.

It is an amenable number.

549361 is a deficient number, since it is larger than the sum of its proper divisors (2051).

549361 is a wasteful number, since it uses less digits than its factorization.

549361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050.

The product of its digits is 3240, while the sum is 28.

The square root of 549361 is about 741.1889097929. The cubic root of 549361 is about 81.9003846856.

Subtracting from 549361 its product of digits (3240), we obtain a square (546121 = 739²).

The spelling of 549361 in words is "five hundred forty-nine thousand, three hundred sixty-one".