1998303 has 16 divisors (see below), whose sum is σ = 2795520. Its totient is φ = 1268064.

The previous prime is 1998301. The next prime is 1998319. The reversal of 1998303 is 3038991.

It is not a de Polignac number, because 1998303 - 2¹ = 1998301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998301) 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 in 15 ways as a sum of consecutive naturals, for example, 8850 + ... + 9072.

It is an arithmetic number, because the mean of its divisors is an integer number (174720).

2^1998303 is an apocalyptic number.

1998303 is a deficient number, since it is larger than the sum of its proper divisors (797217).

1998303 is a wasteful number, since it uses less digits than its factorization.

1998303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1998303 is about 1413.6134549445. The cubic root of 1998303 is about 125.9564601390.

The spelling of 1998303 in words is "one million, nine hundred ninety-eight thousand, three hundred three".