639799214 has 12 divisors (see below), whose sum is σ = 974250144. Its totient is φ = 315120564.

The previous prime is 639799201. The next prime is 639799249. The reversal of 639799214 is 412997936.

639799214 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26654 + ... + 44609.

It is an arithmetic number, because the mean of its divisors is an integer number (81187512).

Almost surely, 2^639799214 is an apocalyptic number.

639799214 is a deficient number, since it is larger than the sum of its proper divisors (334450930).

639799214 is an equidigital number, since it uses as much as digits as its factorization.

639799214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71399 (or 71332 counting only the distinct ones).

The product of its digits is 734832, while the sum is 50.

The square root of 639799214 is about 25294.2525882857. The cubic root of 639799214 is about 861.6837456859.

The spelling of 639799214 in words is "six hundred thirty-nine million, seven hundred ninety-nine thousand, two hundred fourteen".