550999 has 8 divisors (see below), whose sum is σ = 574560. Its totient is φ = 528000.

The previous prime is 550997. The next prime is 551003. The reversal of 550999 is 999055.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 550999 - 2¹ = 550997 is a prime.

It is a Duffinian number.

550999 is a modest number, since divided by 999 gives 550 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3574 + ... + 3724.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2⁵⁵⁰⁹⁹⁹ is an apocalyptic number.

550999 is a deficient number, since it is larger than the sum of its proper divisors (23561).

550999 is a wasteful number, since it uses less digits than its factorization.

550999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its (nonzero) digits is 18225, while the sum is 37.

The square root of 550999 is about 742.2930688077. The cubic root of 550999 is about 81.9817032348.

The spelling of 550999 in words is "five hundred fifty thousand, nine hundred ninety-nine".