1998665303 has 2 divisors, whose sum is σ = 1998665304. Its totient is φ = 1998665302.

The previous prime is 1998665267. The next prime is 1998665353. The reversal of 1998665303 is 3035668991.

It is an a-pointer prime, because the next prime (1998665353) can be obtained adding 1998665303 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1998665303 - 2¹⁴ = 1998648919 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1998665353) 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, 999332651 + 999332652.

It is an arithmetic number, because the mean of its divisors is an integer number (999332652).

Almost surely, 2^1998665303 is an apocalyptic number.

1998665303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998665303 is an equidigital number, since it uses as much as digits as its factorization.

1998665303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 1998665303 is about 44706.4346934532. The cubic root of 1998665303 is about 1259.6407187185.

The spelling of 1998665303 in words is "one billion, nine hundred ninety-eight million, six hundred sixty-five thousand, three hundred three".