2013503 has 4 divisors (see below), whose sum is σ = 2067960. Its totient is φ = 1959048.

The previous prime is 2013491. The next prime is 2013511. The reversal of 2013503 is 3053102.

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 2013503 - 2⁶ = 2013439 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 (2013533) 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, 27173 + ... + 27246.

It is an arithmetic number, because the mean of its divisors is an integer number (516990).

2^2013503 is an apocalyptic number.

2013503 is a deficient number, since it is larger than the sum of its proper divisors (54457).

2013503 is an equidigital number, since it uses as much as digits as its factorization.

2013503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54456.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 2013503 is about 1418.9795629254. The cubic root of 2013503 is about 126.2750144860.

Adding to 2013503 its reverse (3053102), we get a palindrome (5066605).

The spelling of 2013503 in words is "two million, thirteen thousand, five hundred three".