640300683 has 8 divisors (see below), whose sum is σ = 931346496. Its totient is φ = 388061000.

The previous prime is 640300681. The next prime is 640300697. The reversal of 640300683 is 386003046.

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

It is a cyclic number.

It is not a de Polignac number, because 640300683 - 2¹ = 640300681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 640300683.

It is not an unprimeable number, because it can be changed into a prime (640300681) 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, 9701493 + ... + 9701558.

It is an arithmetic number, because the mean of its divisors is an integer number (116418312).

Almost surely, 2^640300683 is an apocalyptic number.

640300683 is a deficient number, since it is larger than the sum of its proper divisors (291045813).

640300683 is a wasteful number, since it uses less digits than its factorization.

640300683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19403065.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 640300683 is about 25304.1633530927. The cubic root of 640300683 is about 861.9088136092.

The spelling of 640300683 in words is "six hundred forty million, three hundred thousand, six hundred eighty-three".