550954861 has 2 divisors, whose sum is σ = 550954862. Its totient is φ = 550954860.

The previous prime is 550954793. The next prime is 550954883. The reversal of 550954861 is 168459055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319336900 + 231617961 = 17870^2 + 15219^2 .

It is a cyclic number.

It is not a de Polignac number, because 550954861 - 2²¹ = 548857709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556954861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275477430 + 275477431.

It is an arithmetic number, because the mean of its divisors is an integer number (275477431).

Almost surely, 2^550954861 is an apocalyptic number.

It is an amenable number.

550954861 is a deficient number, since it is larger than the sum of its proper divisors (1).

550954861 is an equidigital number, since it uses as much as digits as its factorization.

550954861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 550954861 is about 23472.4276758924. The cubic root of 550954861 is about 819.7951406747.

The spelling of 550954861 in words is "five hundred fifty million, nine hundred fifty-four thousand, eight hundred sixty-one".