639316703 has 4 divisors (see below), whose sum is σ = 640360248. Its totient is φ = 638273160.

The previous prime is 639316681. The next prime is 639316721. The reversal of 639316703 is 307613936.

It is a happy number.

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 639316703 - 2¹² = 639312607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639316903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520853 + ... + 522078.

It is an arithmetic number, because the mean of its divisors is an integer number (160090062).

Almost surely, 2^639316703 is an apocalyptic number.

639316703 is a deficient number, since it is larger than the sum of its proper divisors (1043545).

639316703 is a wasteful number, since it uses less digits than its factorization.

639316703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043544.

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 639316703 is about 25284.7128320651. The cubic root of 639316703 is about 861.4670753930.

The spelling of 639316703 in words is "six hundred thirty-nine million, three hundred sixteen thousand, seven hundred three".