549686 has 4 divisors (see below), whose sum is σ = 824532. Its totient is φ = 274842.

The previous prime is 549683. The next prime is 549691. The reversal of 549686 is 686945.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137420 + ... + 137423.

It is an arithmetic number, because the mean of its divisors is an integer number (206133).

2⁵⁴⁹⁶⁸⁶ is an apocalyptic number.

549686 is a deficient number, since it is larger than the sum of its proper divisors (274846).

549686 is a wasteful number, since it uses less digits than its factorization.

549686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274845.

The product of its digits is 51840, while the sum is 38.

The square root of 549686 is about 741.4081197289. The cubic root of 549686 is about 81.9165321599.

The spelling of 549686 in words is "five hundred forty-nine thousand, six hundred eighty-six".