6445003 has 2 divisors, whose sum is σ = 6445004. Its totient is φ = 6445002.

The previous prime is 6444979. The next prime is 6445051. The reversal of 6445003 is 3005446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6445003 - 2⁹ = 6444491 is a prime.

It is not a weakly prime, because it can be changed into another prime (6445093) 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 as a sum of consecutive naturals, namely, 3222501 + 3222502.

It is an arithmetic number, because the mean of its divisors is an integer number (3222502).

Almost surely, 2^6445003 is an apocalyptic number.

6445003 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445003 is an equidigital number, since it uses as much as digits as its factorization.

6445003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 6445003 is about 2538.7010458106. The cubic root of 6445003 is about 186.0977152574.

The spelling of 6445003 in words is "six million, four hundred forty-five thousand, three".