640600003 has 4 divisors (see below), whose sum is σ = 643919368. Its totient is φ = 637280640.

The previous prime is 640599983. The next prime is 640600013. The reversal of 640600003 is 300006046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300006046 = 2 ⋅150003023.

It is a cyclic number.

It is not a de Polignac number, because 640600003 - 2²⁹ = 103729091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640600013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1659393 + ... + 1659778.

It is an arithmetic number, because the mean of its divisors is an integer number (160979842).

Almost surely, 2^640600003 is an apocalyptic number.

640600003 is a deficient number, since it is larger than the sum of its proper divisors (3319365).

640600003 is a wasteful number, since it uses less digits than its factorization.

640600003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319364.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 640600003 is about 25310.0771037941. The cubic root of 640600003 is about 862.0430975809.

Adding to 640600003 its reverse (300006046), we get a palindrome (940606049).

The spelling of 640600003 in words is "six hundred forty million, six hundred thousand, three".