550504861 has 2 divisors, whose sum is σ = 550504862. Its totient is φ = 550504860.

The previous prime is 550504859. The next prime is 550504873. The reversal of 550504861 is 168405055.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401200900 + 149303961 = 20030^2 + 12219^2 .

It is a cyclic number.

It is not a de Polignac number, because 550504861 - 2¹ = 550504859 is a prime.

Together with 550504859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550504891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275252430 + 275252431.

It is an arithmetic number, because the mean of its divisors is an integer number (275252431).

Almost surely, 2^550504861 is an apocalyptic number.

It is an amenable number.

550504861 is a deficient number, since it is larger than the sum of its proper divisors (1).

550504861 is an equidigital number, since it uses as much as digits as its factorization.

550504861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 550504861 is about 23462.8400028641. The cubic root of 550504861 is about 819.5718868767.

The spelling of 550504861 in words is "five hundred fifty million, five hundred four thousand, eight hundred sixty-one".