639500107 has 2 divisors, whose sum is σ = 639500108. Its totient is φ = 639500106.

The previous prime is 639500041. The next prime is 639500111. The reversal of 639500107 is 701005936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 639500107 - 2⁷ = 639499979 is a prime.

It is a super-2 number, since 2×639500107² = 817920773706022898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (639500207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319750053 + 319750054.

It is an arithmetic number, because the mean of its divisors is an integer number (319750054).

Almost surely, 2^639500107 is an apocalyptic number.

639500107 is a deficient number, since it is larger than the sum of its proper divisors (1).

639500107 is an equidigital number, since it uses as much as digits as its factorization.

639500107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 639500107 is about 25288.3393484032. The cubic root of 639500107 is about 861.5494453153.

The spelling of 639500107 in words is "six hundred thirty-nine million, five hundred thousand, one hundred seven".