638376083 has 2 divisors, whose sum is σ = 638376084. Its totient is φ = 638376082.

The previous prime is 638376071. The next prime is 638376091. The reversal of 638376083 is 380673836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 638376083 - 2⁶ = 638376019 is a prime.

It is not a weakly prime, because it can be changed into another prime (638376883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319188041 + 319188042.

It is an arithmetic number, because the mean of its divisors is an integer number (319188042).

Almost surely, 2^638376083 is an apocalyptic number.

638376083 is a deficient number, since it is larger than the sum of its proper divisors (1).

638376083 is an equidigital number, since it uses as much as digits as its factorization.

638376083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 638376083 is about 25266.1054181288. The cubic root of 638376083 is about 861.0443788466.

The spelling of 638376083 in words is "six hundred thirty-eight million, three hundred seventy-six thousand, eighty-three".