6442003 has 2 divisors, whose sum is σ = 6442004. Its totient is φ = 6442002.

The previous prime is 6441989. The next prime is 6442021. The reversal of 6442003 is 3002446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6442003 is a prime.

It is not a weakly prime, because it can be changed into another prime (6442063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221001 + 3221002.

It is an arithmetic number, because the mean of its divisors is an integer number (3221002).

Almost surely, 2^6442003 is an apocalyptic number.

6442003 is a deficient number, since it is larger than the sum of its proper divisors (1).

6442003 is an equidigital number, since it uses as much as digits as its factorization.

6442003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 6442003 is about 2538.1101236944. The cubic root of 6442003 is about 186.0688360470.

Adding to 6442003 its reverse (3002446), we get a palindrome (9444449).

The spelling of 6442003 in words is "six million, four hundred forty-two thousand, three".