640003003 has 2 divisors, whose sum is σ = 640003004. Its totient is φ = 640003002.

The previous prime is 640002997. The next prime is 640003009. The reversal of 640003003 is 300300046.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (640002997) and next prime (640003009).

It is a cyclic number.

It is not a de Polignac number, because 640003003 - 2⁵ = 640002971 is a prime.

640003003 is a modest number, since divided by 3003 gives 640 as remainder.

It is not a weakly prime, because it can be changed into another prime (640003009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320001501 + 320001502.

It is an arithmetic number, because the mean of its divisors is an integer number (320001502).

Almost surely, 2^640003003 is an apocalyptic number.

640003003 is a deficient number, since it is larger than the sum of its proper divisors (1).

640003003 is an equidigital number, since it uses as much as digits as its factorization.

640003003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 640003003 is about 25298.2806332762. The cubic root of 640003003 is about 861.7752238788.

Adding to 640003003 its reverse (300300046), we get a palindrome (940303049).

The spelling of 640003003 in words is "six hundred forty million, three thousand, three".