999966203 has 2 divisors, whose sum is σ = 999966204. Its totient is φ = 999966202.

The previous prime is 999966199. The next prime is 999966221. The reversal of 999966203 is 302669999.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (302669999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999966203 - 2² = 999966199 is a prime.

It is not a weakly prime, because it can be changed into another prime (999966293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499983101 + 499983102.

It is an arithmetic number, because the mean of its divisors is an integer number (499983102).

Almost surely, 2^999966203 is an apocalyptic number.

999966203 is a deficient number, since it is larger than the sum of its proper divisors (1).

999966203 is an equidigital number, since it uses as much as digits as its factorization.

999966203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1417176, while the sum is 53.

The square root of 999966203 is about 31622.2422196782. The cubic root of 999966203 is about 999.9887342064.

The spelling of 999966203 in words is "nine hundred ninety-nine million, nine hundred sixty-six thousand, two hundred three".