638301983 has 12 divisors (see below), whose sum is σ = 703188024. Its totient is φ = 578965200.

The previous prime is 638301967. The next prime is 638301991. The reversal of 638301983 is 389103836.

It is not a de Polignac number, because 638301983 - 2⁴ = 638301967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 638301983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638301383) 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 11 ways as a sum of consecutive naturals, for example, 50060 + ... + 61502.

It is an arithmetic number, because the mean of its divisors is an integer number (58599002).

Almost surely, 2^638301983 is an apocalyptic number.

638301983 is a deficient number, since it is larger than the sum of its proper divisors (64886041).

638301983 is a wasteful number, since it uses less digits than its factorization.

638301983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11926 (or 11915 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 638301983 is about 25264.6389841612. The cubic root of 638301983 is about 861.0110620923.

The spelling of 638301983 in words is "six hundred thirty-eight million, three hundred one thousand, nine hundred eighty-three".