639245603 has 2 divisors, whose sum is σ = 639245604. Its totient is φ = 639245602.

The previous prime is 639245599. The next prime is 639245623. The reversal of 639245603 is 306542936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 639245603 - 2² = 639245599 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (639245623) 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, 319622801 + 319622802.

It is an arithmetic number, because the mean of its divisors is an integer number (319622802).

Almost surely, 2^639245603 is an apocalyptic number.

639245603 is a deficient number, since it is larger than the sum of its proper divisors (1).

639245603 is an equidigital number, since it uses as much as digits as its factorization.

639245603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 639245603 is about 25283.3068050839. The cubic root of 639245603 is about 861.4351389107.

The spelling of 639245603 in words is "six hundred thirty-nine million, two hundred forty-five thousand, six hundred three".