640719483 has 4 divisors (see below), whose sum is σ = 854292648. Its totient is φ = 427146320.

The previous prime is 640719473. The next prime is 640719503. The reversal of 640719483 is 384917046.

640719483 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 640719483 - 2⁶ = 640719419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640719433) 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, 106786578 + ... + 106786583.

It is an arithmetic number, because the mean of its divisors is an integer number (213573162).

Almost surely, 2^640719483 is an apocalyptic number.

640719483 is a deficient number, since it is larger than the sum of its proper divisors (213573165).

640719483 is a wasteful number, since it uses less digits than its factorization.

640719483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213573164.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 640719483 is about 25312.4373184409. The cubic root of 640719483 is about 862.0966882282.

The spelling of 640719483 in words is "six hundred forty million, seven hundred nineteen thousand, four hundred eighty-three".