999985803 has 4 divisors (see below), whose sum is σ = 1333314408. Its totient is φ = 666657200.

The previous prime is 999985741. The next prime is 999985837. The reversal of 999985803 is 308589999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 999985803 - 2¹⁰ = 999984779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999985403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166664298 + ... + 166664303.

It is an arithmetic number, because the mean of its divisors is an integer number (333328602).

Almost surely, 2^999985803 is an apocalyptic number.

999985803 is a deficient number, since it is larger than the sum of its proper divisors (333328605).

999985803 is a wasteful number, since it uses less digits than its factorization.

999985803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333328604.

The product of its (nonzero) digits is 6298560, while the sum is 60.

The square root of 999985803 is about 31622.5521266074. The cubic root of 999985803 is about 999.9952676443.

The spelling of 999985803 in words is "nine hundred ninety-nine million, nine hundred eighty-five thousand, eight hundred three".