550643 has 8 divisors (see below), whose sum is σ = 583200. Its totient is φ = 518848.

The previous prime is 550637. The next prime is 550651. The reversal of 550643 is 346055.

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 550643 - 2¹² = 546547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1913 + ... + 2181.

It is an arithmetic number, because the mean of its divisors is an integer number (72900).

2⁵⁵⁰⁶⁴³ is an apocalyptic number.

550643 is a deficient number, since it is larger than the sum of its proper divisors (32557).

550643 is a wasteful number, since it uses less digits than its factorization.

550643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 550643 is about 742.0532325918. The cubic root of 550643 is about 81.9640433273.

Adding to 550643 its reverse (346055), we get a palindrome (896698).

The spelling of 550643 in words is "five hundred fifty thousand, six hundred forty-three".