2013603 has 4 divisors (see below), whose sum is σ = 2684808. Its totient is φ = 1342400.

The previous prime is 2013593. The next prime is 2013617. The reversal of 2013603 is 3063102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2013603 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2013653) 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 3 ways as a sum of consecutive naturals, for example, 335598 + ... + 335603.

It is an arithmetic number, because the mean of its divisors is an integer number (671202).

2^2013603 is an apocalyptic number.

2013603 is a deficient number, since it is larger than the sum of its proper divisors (671205).

2013603 is an equidigital number, since it uses as much as digits as its factorization.

2013603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671204.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 2013603 is about 1419.0147990772. The cubic root of 2013603 is about 126.2771049211.

Adding to 2013603 its reverse (3063102), we get a palindrome (5076705).

The spelling of 2013603 in words is "two million, thirteen thousand, six hundred three".