9989903 has 16 divisors (see below), whose sum is σ = 12559104. Its totient is φ = 7719360.

The previous prime is 9989899. The next prime is 9989921. The reversal of 9989903 is 3099899.

It is a happy number.

9989903 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9989903 - 2² = 9989899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989923) 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 15 ways as a sum of consecutive naturals, for example, 10076 + ... + 11022.

It is an arithmetic number, because the mean of its divisors is an integer number (784944).

Almost surely, 2^9989903 is an apocalyptic number.

9989903 is a deficient number, since it is larger than the sum of its proper divisors (2569201).

9989903 is a wasteful number, since it uses less digits than its factorization.

9989903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 9989903 is about 3160.6807810976. The cubic root of 9989903 is about 215.3709334945.

It can be divided in two parts, 998 and 9903, that added together give a palindrome (10901).

The spelling of 9989903 in words is "nine million, nine hundred eighty-nine thousand, nine hundred three".