550019993 has 2 divisors, whose sum is σ = 550019994. Its totient is φ = 550019992.

The previous prime is 550019971. The next prime is 550020019. The reversal of 550019993 is 399910055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 521802649 + 28217344 = 22843^2 + 5312^2 .

It is a cyclic number.

It is not a de Polignac number, because 550019993 - 2²⁰ = 548971417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 550019993.

It is not a weakly prime, because it can be changed into another prime (550019933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275009996 + 275009997.

It is an arithmetic number, because the mean of its divisors is an integer number (275009997).

Almost surely, 2^550019993 is an apocalyptic number.

It is an amenable number.

550019993 is a deficient number, since it is larger than the sum of its proper divisors (1).

550019993 is an equidigital number, since it uses as much as digits as its factorization.

550019993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54675, while the sum is 41.

The square root of 550019993 is about 23452.5050474358. The cubic root of 550019993 is about 819.3311981714.

The spelling of 550019993 in words is "five hundred fifty million, nineteen thousand, nine hundred ninety-three".