550961 has 2 divisors, whose sum is σ = 550962. Its totient is φ = 550960.

The previous prime is 550951. The next prime is 550969. The reversal of 550961 is 169055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295936 + 255025 = 544^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 550961 - 2¹⁰ = 549937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 550961.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 550961.

It is not a weakly prime, because it can be changed into another prime (550969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275480 + 275481.

It is an arithmetic number, because the mean of its divisors is an integer number (275481).

2⁵⁵⁰⁹⁶¹ is an apocalyptic number.

It is an amenable number.

550961 is a deficient number, since it is larger than the sum of its proper divisors (1).

550961 is an equidigital number, since it uses as much as digits as its factorization.

550961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 550961 is about 742.2674720072. The cubic root of 550961 is about 81.9798185512.

The spelling of 550961 in words is "five hundred fifty thousand, nine hundred sixty-one".