639219103 has 2 divisors, whose sum is σ = 639219104. Its totient is φ = 639219102.

The previous prime is 639219079. The next prime is 639219143. The reversal of 639219103 is 301912936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 639219103 - 2¹³ = 639210911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (639219143) 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 as a sum of consecutive naturals, namely, 319609551 + 319609552.

It is an arithmetic number, because the mean of its divisors is an integer number (319609552).

Almost surely, 2^639219103 is an apocalyptic number.

639219103 is a deficient number, since it is larger than the sum of its proper divisors (1).

639219103 is an equidigital number, since it uses as much as digits as its factorization.

639219103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 639219103 is about 25282.7827384566. The cubic root of 639219103 is about 861.4232351153.

The spelling of 639219103 in words is "six hundred thirty-nine million, two hundred nineteen thousand, one hundred three".