2013903 has 30 divisors (see below), whose sum is σ = 3211824. Its totient is φ = 1256904.

The previous prime is 2013899. The next prime is 2013911. The reversal of 2013903 is 3093102.

It is not a de Polignac number, because 2013903 - 2² = 2013899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013923) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 42826 + ... + 42872.

2^2013903 is an apocalyptic number.

2013903 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2013903 is a deficient number, since it is larger than the sum of its proper divisors (1197921).

2013903 is an equidigital number, since it uses as much as digits as its factorization.

2013903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 2013903 is about 1419.1205022830. The cubic root of 2013903 is about 126.2833758114.

It can be divided in two parts, 2013 and 903, that added together give a square (2916 = 54²).

The spelling of 2013903 in words is "two million, thirteen thousand, nine hundred three".