550903 has 2 divisors, whose sum is σ = 550904. Its totient is φ = 550902.

The previous prime is 550861. The next prime is 550909. The reversal of 550903 is 309055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 550903 - 2¹⁷ = 419831 is a prime.

550903 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275451 + 275452.

It is an arithmetic number, because the mean of its divisors is an integer number (275452).

2⁵⁵⁰⁹⁰³ is an apocalyptic number.

550903 is a deficient number, since it is larger than the sum of its proper divisors (1).

550903 is an equidigital number, since it uses as much as digits as its factorization.

550903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 550903 is about 742.2284015046. The cubic root of 550903 is about 81.9769417618.

Adding to 550903 its reverse (309055), we get a palindrome (859958).

The spelling of 550903 in words is "five hundred fifty thousand, nine hundred three".