640144003 has 2 divisors, whose sum is σ = 640144004. Its totient is φ = 640144002.

The previous prime is 640143997. The next prime is 640144009. The reversal of 640144003 is 300441046.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (640143997) and next prime (640144009).

It is a cyclic number.

It is not a de Polignac number, because 640144003 - 2⁵ = 640143971 is a prime.

It is not a weakly prime, because it can be changed into another prime (640144009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320072001 + 320072002.

It is an arithmetic number, because the mean of its divisors is an integer number (320072002).

Almost surely, 2^640144003 is an apocalyptic number.

640144003 is a deficient number, since it is larger than the sum of its proper divisors (1).

640144003 is an equidigital number, since it uses as much as digits as its factorization.

640144003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 640144003 is about 25301.0672304549. The cubic root of 640144003 is about 861.8385055529.

Adding to 640144003 its reverse (300441046), we get a palindrome (940585049).

The spelling of 640144003 in words is "six hundred forty million, one hundred forty-four thousand, three".