638924983 has 8 divisors (see below), whose sum is σ = 650149200. Its totient is φ = 627714048.

The previous prime is 638924977. The next prime is 638924999. The reversal of 638924983 is 389429836.

638924983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 638924983 - 2¹³ = 638916791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 638924983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638924933) 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, 190263 + ... + 193591.

It is an arithmetic number, because the mean of its divisors is an integer number (81268650).

Almost surely, 2^638924983 is an apocalyptic number.

638924983 is a deficient number, since it is larger than the sum of its proper divisors (11224217).

638924983 is a wasteful number, since it uses less digits than its factorization.

638924983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6641.

The product of its digits is 2239488, while the sum is 52.

The square root of 638924983 is about 25276.9654626500. The cubic root of 638924983 is about 861.2910943673.

The spelling of 638924983 in words is "six hundred thirty-eight million, nine hundred twenty-four thousand, nine hundred eighty-three".