640640103 has 8 divisors (see below), whose sum is σ = 858480000. Its totient is φ = 424946808.

The previous prime is 640640093. The next prime is 640640107. The reversal of 640640103 is 301046046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 640640103 - 2⁸ = 640639847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640640107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535953 + ... + 537146.

It is an arithmetic number, because the mean of its divisors is an integer number (107310000).

Almost surely, 2^640640103 is an apocalyptic number.

640640103 is a deficient number, since it is larger than the sum of its proper divisors (217839897).

640640103 is a wasteful number, since it uses less digits than its factorization.

640640103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073301.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 640640103 is about 25310.8692659893. The cubic root of 640640103 is about 862.0610844717.

Adding to 640640103 its reverse (301046046), we get a palindrome (941686149).

The spelling of 640640103 in words is "six hundred forty million, six hundred forty thousand, one hundred three".