549969 has 8 divisors (see below), whose sum is σ = 838080. Its totient is φ = 314256.

The previous prime is 549949. The next prime is 549977. The reversal of 549969 is 969945.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 549969 - 2⁵ = 549937 is a prime.

It is a super-2 number, since 2×549969² = 604931801922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 549969.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549969.

It is not an unprimeable number, because it can be changed into a prime (549949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13074 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (104760).

2⁵⁴⁹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

549969 is a deficient number, since it is larger than the sum of its proper divisors (288111).

549969 is a wasteful number, since it uses less digits than its factorization.

549969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26199.

The product of its digits is 87480, while the sum is 42.

The square root of 549969 is about 741.5989482193. The cubic root of 549969 is about 81.9305877003.

The spelling of 549969 in words is "five hundred forty-nine thousand, nine hundred sixty-nine".