640012203 has 6 divisors (see below), whose sum is σ = 924462084. Its totient is φ = 426674796.

The previous prime is 640012181. The next prime is 640012213. The reversal of 640012203 is 302210046.

It is a happy number.

640012203 is a `hidden beast` number, since 640 + 0 + 1 + 2 + 20 + 3 = 666.

It is not a de Polignac number, because 640012203 - 2¹² = 640008107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640012213) 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 in 5 ways as a sum of consecutive naturals, for example, 35556225 + ... + 35556242.

It is an arithmetic number, because the mean of its divisors is an integer number (154077014).

Almost surely, 2^640012203 is an apocalyptic number.

640012203 is a deficient number, since it is larger than the sum of its proper divisors (284449881).

640012203 is a wasteful number, since it uses less digits than its factorization.

640012203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71112473 (or 71112470 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 640012203 is about 25298.4624631617. The cubic root of 640012203 is about 861.7793531793.

Adding to 640012203 its reverse (302210046), we get a palindrome (942222249).

The spelling of 640012203 in words is "six hundred forty million, twelve thousand, two hundred three".