638475059 has 2 divisors, whose sum is σ = 638475060. Its totient is φ = 638475058.

The previous prime is 638475043. The next prime is 638475109. The reversal of 638475059 is 950574836.

638475059 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 638475059 - 2⁴ = 638475043 is a prime.

It is not a weakly prime, because it can be changed into another prime (638475559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319237529 + 319237530.

It is an arithmetic number, because the mean of its divisors is an integer number (319237530).

Almost surely, 2^638475059 is an apocalyptic number.

638475059 is a deficient number, since it is larger than the sum of its proper divisors (1).

638475059 is an equidigital number, since it uses as much as digits as its factorization.

638475059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 638475059 is about 25268.0640136913. The cubic root of 638475059 is about 861.0888762970.

The spelling of 638475059 in words is "six hundred thirty-eight million, four hundred seventy-five thousand, fifty-nine".