550129 has 2 divisors, whose sum is σ = 550130. Its totient is φ = 550128.

The previous prime is 550127. The next prime is 550139. The reversal of 550129 is 921055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429025 + 121104 = 655^2 + 348^2 .

It is a cyclic number.

It is not a de Polignac number, because 550129 - 2¹ = 550127 is a prime.

Together with 550127, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (550127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275064 + 275065.

It is an arithmetic number, because the mean of its divisors is an integer number (275065).

2⁵⁵⁰¹²⁹ is an apocalyptic number.

It is an amenable number.

550129 is a deficient number, since it is larger than the sum of its proper divisors (1).

550129 is an equidigital number, since it uses as much as digits as its factorization.

550129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 550129 is about 741.7068153927. The cubic root of 550129 is about 81.9385321620.

The spelling of 550129 in words is "five hundred fifty thousand, one hundred twenty-nine".