549779 has 4 divisors (see below), whose sum is σ = 551376. Its totient is φ = 548184.

The previous prime is 549767. The next prime is 549817. The reversal of 549779 is 977945.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 549779 - 2¹⁶ = 484243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549719) 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, 44 + ... + 1049.

It is an arithmetic number, because the mean of its divisors is an integer number (137844).

2⁵⁴⁹⁷⁷⁹ is an apocalyptic number.

549779 is a deficient number, since it is larger than the sum of its proper divisors (1597).

549779 is a wasteful number, since it uses less digits than its factorization.

549779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596.

The product of its digits is 79380, while the sum is 41.

The square root of 549779 is about 741.4708355694. The cubic root of 549779 is about 81.9211516505.

The spelling of 549779 in words is "five hundred forty-nine thousand, seven hundred seventy-nine".