640965303 has 12 divisors (see below), whose sum is σ = 1010006088. Its totient is φ = 388463760.

The previous prime is 640965289. The next prime is 640965329. The reversal of 640965303 is 303569046.

640965303 is a `hidden beast` number, since 640 + 9 + 6 + 5 + 3 + 0 + 3 = 666.

It is not a de Polignac number, because 640965303 - 2⁵ = 640965271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640965503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3237100 + ... + 3237297.

It is an arithmetic number, because the mean of its divisors is an integer number (84167174).

Almost surely, 2^640965303 is an apocalyptic number.

640965303 is a deficient number, since it is larger than the sum of its proper divisors (369040785).

640965303 is a wasteful number, since it uses less digits than its factorization.

640965303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6474414 (or 6474411 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 640965303 is about 25317.2925685192. The cubic root of 640965303 is about 862.2069255044.

The spelling of 640965303 in words is "six hundred forty million, nine hundred sixty-five thousand, three hundred three".