999999986803 has 2 divisors, whose sum is σ = 999999986804. Its totient is φ = 999999986802.

The previous prime is 999999986789. The next prime is 999999986891. The reversal of 999999986803 is 308689999999.

It is an a-pointer prime, because the next prime (999999986891) can be obtained adding 999999986803 to its sum of digits (88).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999999986803 - 2²⁵ = 999966432371 is a prime.

It is not a weakly prime, because it can be changed into another prime (999999986203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999993401 + 499999993402.

It is an arithmetic number, because the mean of its divisors is an integer number (499999993402).

Almost surely, 2^999999986803 is an apocalyptic number.

999999986803 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999986803 is an equidigital number, since it uses as much as digits as its factorization.

999999986803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5509980288, while the sum is 88.

The spelling of 999999986803 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred eighty-six thousand, eight hundred three".