639030129 has 8 divisors (see below), whose sum is σ = 852164640. Its totient is φ = 425957856.

The previous prime is 639030089. The next prime is 639030143. The reversal of 639030129 is 921030936.

639030129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 639030129 - 2¹³ = 639021937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 639030129.

It is not an unprimeable number, because it can be changed into a prime (639030149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20034 + ... + 40980.

It is an arithmetic number, because the mean of its divisors is an integer number (106520580).

Almost surely, 2^639030129 is an apocalyptic number.

It is an amenable number.

639030129 is a deficient number, since it is larger than the sum of its proper divisors (213134511).

639030129 is a wasteful number, since it uses less digits than its factorization.

639030129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31119.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 639030129 is about 25279.0452549142. The cubic root of 639030129 is about 861.3383384875.

The spelling of 639030129 in words is "six hundred thirty-nine million, thirty thousand, one hundred twenty-nine".