646322003 has 2 divisors, whose sum is σ = 646322004. Its totient is φ = 646322002.

The previous prime is 646321969. The next prime is 646322009. The reversal of 646322003 is 300223646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646322003 - 2⁶ = 646321939 is a prime.

It is not a weakly prime, because it can be changed into another prime (646322009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323161001 + 323161002.

It is an arithmetic number, because the mean of its divisors is an integer number (323161002).

Almost surely, 2^646322003 is an apocalyptic number.

646322003 is a deficient number, since it is larger than the sum of its proper divisors (1).

646322003 is an equidigital number, since it uses as much as digits as its factorization.

646322003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 646322003 is about 25422.8637843969. The cubic root of 646322003 is about 864.6021550223.

Adding to 646322003 its reverse (300223646), we get a palindrome (946545649).

The spelling of 646322003 in words is "six hundred forty-six million, three hundred twenty-two thousand, three".