2003591 has 2 divisors, whose sum is σ = 2003592. Its totient is φ = 2003590.

The previous prime is 2003557. The next prime is 2003593. The reversal of 2003591 is 1953002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2003591 - 2¹⁸ = 1741447 is a prime.

It is a Sophie Germain prime.

Together with 2003593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001795 + 1001796.

It is an arithmetic number, because the mean of its divisors is an integer number (1001796).

2^2003591 is an apocalyptic number.

2003591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003591 is an equidigital number, since it uses as much as digits as its factorization.

2003591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 2003591 is about 1415.4826032135. The cubic root of 2003591 is about 126.0674661786.

Adding to 2003591 its reverse (1953002), we get a palindrome (3956593).

The spelling of 2003591 in words is "two million, three thousand, five hundred ninety-one".