550664993 has 2 divisors, whose sum is σ = 550664994. Its totient is φ = 550664992.

The previous prime is 550664971. The next prime is 550665001. The reversal of 550664993 is 399466055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427166224 + 123498769 = 20668^2 + 11113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550664993 is a prime.

It is equal to p_28878482 and since 550664993 and 28878482 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (550664953) 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, 275332496 + 275332497.

It is an arithmetic number, because the mean of its divisors is an integer number (275332497).

Almost surely, 2^550664993 is an apocalyptic number.

It is an amenable number.

550664993 is a deficient number, since it is larger than the sum of its proper divisors (1).

550664993 is an equidigital number, since it uses as much as digits as its factorization.

550664993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 47.

The square root of 550664993 is about 23466.2522146166. The cubic root of 550664993 is about 819.6513454317.

The spelling of 550664993 in words is "five hundred fifty million, six hundred sixty-four thousand, nine hundred ninety-three".