999998803 has 16 divisors (see below), whose sum is σ = 1081136160. Its totient is φ = 921484800.

The previous prime is 999998801. The next prime is 999998843. The reversal of 999998803 is 308899999.

It is a cyclic number.

It is not a de Polignac number, because 999998803 - 2¹ = 999998801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999998801) 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, 235368 + ... + 239578.

It is an arithmetic number, because the mean of its divisors is an integer number (67571010).

Almost surely, 2^999998803 is an apocalyptic number.

999998803 is a deficient number, since it is larger than the sum of its proper divisors (81137357).

999998803 is a wasteful number, since it uses less digits than its factorization.

999998803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518.

The product of its (nonzero) digits is 11337408, while the sum is 64.

The square root of 999998803 is about 31622.7576754463. The cubic root of 999998803 is about 999.9996009998. Note that the first 3 decimals are identical.

The spelling of 999998803 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, eight hundred three".