2002003 has 4 divisors (see below), whose sum is σ = 2020480. Its totient is φ = 1983528.

The previous prime is 2002001. The next prime is 2002009. The reversal of 2002003 is 3002002.

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 2002003 - 2¹ = 2002001 is a prime.

It is a Duffinian number.

2002003 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2002001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9075 + ... + 9292.

It is an arithmetic number, because the mean of its divisors is an integer number (505120).

2^2002003 is an apocalyptic number.

2002003 is a deficient number, since it is larger than the sum of its proper divisors (18477).

2002003 is a wasteful number, since it uses less digits than its factorization.

2002003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18476.

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 2002003 is about 1414.9215525958. The cubic root of 2002003 is about 126.0341513205.

Adding to 2002003 its reverse (3002002), we get a palindrome (5004005).

Subtracting 2002003 from its reverse (3002002), we obtain a palindrome (999999).

The spelling of 2002003 in words is "two million, two thousand, three".