550001129 has 2 divisors, whose sum is σ = 550001130. Its totient is φ = 550001128.

The previous prime is 550001107. The next prime is 550001131. The reversal of 550001129 is 921100055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430645504 + 119355625 = 20752^2 + 10925^2 .

It is a cyclic number.

It is not a de Polignac number, because 550001129 - 2⁸ = 550000873 is a prime.

Together with 550001131, 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 (550001149) 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, 275000564 + 275000565.

It is an arithmetic number, because the mean of its divisors is an integer number (275000565).

Almost surely, 2^550001129 is an apocalyptic number.

It is an amenable number.

550001129 is a deficient number, since it is larger than the sum of its proper divisors (1).

550001129 is an equidigital number, since it uses as much as digits as its factorization.

550001129 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 23.

The square root of 550001129 is about 23452.1028694657. The cubic root of 550001129 is about 819.3218312146.

The spelling of 550001129 in words is "five hundred fifty million, one thousand, one hundred twenty-nine".