638271203 has 2 divisors, whose sum is σ = 638271204. Its totient is φ = 638271202.

The previous prime is 638271187. The next prime is 638271301. The reversal of 638271203 is 302172836.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 638271203 - 2⁴ = 638271187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 638271203.

It is not a weakly prime, because it can be changed into another prime (638241203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319135601 + 319135602.

It is an arithmetic number, because the mean of its divisors is an integer number (319135602).

Almost surely, 2^638271203 is an apocalyptic number.

638271203 is a deficient number, since it is larger than the sum of its proper divisors (1).

638271203 is an equidigital number, since it uses as much as digits as its factorization.

638271203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 638271203 is about 25264.0298250299. The cubic root of 638271203 is about 860.9972220671.

The spelling of 638271203 in words is "six hundred thirty-eight million, two hundred seventy-one thousand, two hundred three".