6404003 has 2 divisors, whose sum is σ = 6404004. Its totient is φ = 6404002.

The previous prime is 6403993. The next prime is 6404009. The reversal of 6404003 is 3004046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6404003 - 2⁶ = 6403939 is a prime.

It is a super-2 number, since 2×6404003² = 82022508848018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6404009) 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, 3202001 + 3202002.

It is an arithmetic number, because the mean of its divisors is an integer number (3202002).

Almost surely, 2^6404003 is an apocalyptic number.

6404003 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404003 is an equidigital number, since it uses as much as digits as its factorization.

6404003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 6404003 is about 2530.6131668037. The cubic root of 6404003 is about 185.7022541938.

Adding to 6404003 its reverse (3004046), we get a palindrome (9408049).

The spelling of 6404003 in words is "six million, four hundred four thousand, three".