9900003 has 4 divisors (see below), whose sum is σ = 13200008. Its totient is φ = 6600000.

The previous prime is 9899999. The next prime is 9900047. The reversal of 9900003 is 3000099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3000099 = 3 ⋅1000033.

It is not a de Polignac number, because 9900003 - 2² = 9899999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9900203) 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, 1649998 + ... + 1650003.

It is an arithmetic number, because the mean of its divisors is an integer number (3300002).

Almost surely, 2^9900003 is an apocalyptic number.

9900003 is a deficient number, since it is larger than the sum of its proper divisors (3300005).

9900003 is a wasteful number, since it uses less digits than its factorization.

9900003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300004.

The product of its (nonzero) digits is 243, while the sum is 21.

The square root of 9900003 is about 3146.4270212417. The cubic root of 9900003 is about 214.7229385911.

The spelling of 9900003 in words is "nine million, nine hundred thousand, three".