639303867079 has 2 divisors, whose sum is σ = 639303867080. Its totient is φ = 639303867078.

The previous prime is 639303867067. The next prime is 639303867101. The reversal of 639303867079 is 970768303936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 639303867079 - 2²⁹ = 638766996167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (639303867049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319651933539 + 319651933540.

It is an arithmetic number, because the mean of its divisors is an integer number (319651933540).

Almost surely, 2^639303867079 is an apocalyptic number.

639303867079 is a deficient number, since it is larger than the sum of its proper divisors (1).

639303867079 is an equidigital number, since it uses as much as digits as its factorization.

639303867079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30862944, while the sum is 61.

The spelling of 639303867079 in words is "six hundred thirty-nine billion, three hundred three million, eight hundred sixty-seven thousand, seventy-nine".