2003903 has 8 divisors (see below), whose sum is σ = 2219520. Its totient is φ = 1793880.

The previous prime is 2003879. The next prime is 2003917. The reversal of 2003903 is 3093002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2003903 - 2⁶ = 2003839 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 (2003803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623 + ... + 2096.

It is an arithmetic number, because the mean of its divisors is an integer number (277440).

2^2003903 is an apocalyptic number.

2003903 is a deficient number, since it is larger than the sum of its proper divisors (215617).

2003903 is a wasteful number, since it uses less digits than its factorization.

2003903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 2003903 is about 1415.5928086848. The cubic root of 2003903 is about 126.0740095979.

Adding to 2003903 its reverse (3093002), we get a palindrome (5096905).

The spelling of 2003903 in words is "two million, three thousand, nine hundred three".