1003003 has 2 divisors, whose sum is σ = 1003004. Its totient is φ = 1003002.

The previous prime is 1003001. The next prime is 1003019. The reversal of 1003003 is 3003001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1003003 - 2¹ = 1003001 is a prime.

Together with 1003001, it forms a pair of twin primes.

It is the 1002-nd Hogben number.

1003003 is a modest number, since divided by 3003 gives 1 as remainder.

It is not a weakly prime, because it can be changed into another prime (1003001) by changing a digit.

It is a nontrivial repunit in base 1001.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501501 + 501502.

It is an arithmetic number, because the mean of its divisors is an integer number (501502).

2^1003003 is an apocalyptic number.

1003003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003003 is an equidigital number, since it uses as much as digits as its factorization.

1003003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 7.

The square root of 1003003 is about 1001.5003744383. The cubic root of 1003003 is about 100.0999999667.

Adding to 1003003 its reverse (3003001), we get a palindrome (4006004).

The spelling of 1003003 in words is "one million, three thousand, three".