9999803 has 10 divisors (see below), whose sum is σ = 11015820.
Its totient is φ = 9077420.
The previous prime is 9999761. The next prime is 9999823. The reversal of 9999803 is 3089999.
It is a happy number.
It is not a de Polignac number, because 9999803 - 26 = 9999739 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (9999823) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14300 + ... + 14982.
It is an arithmetic number, because the mean of its divisors is an integer number (1101582).
Almost surely, 29999803 is an apocalyptic number.
9999803 is a deficient number, since it is larger than the sum of its proper divisors (1016017).
9999803 is an frugal number, since it uses more digits than its factorization.
9999803 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 727 (or 694 counting only the distinct ones).
The product of its (nonzero) digits is 157464, while the sum is 47.
The square root of 9999803 is about 3162.2465115800.
The cubic root of 9999803 is about 215.4420542485.
The spelling of 9999803 in words is "nine million, nine hundred ninety-nine thousand, eight hundred three".