639103129 has 12 divisors (see below), whose sum is σ = 743863908. Its totient is φ = 547495200.

The previous prime is 639103111. The next prime is 639103141. The reversal of 639103129 is 921301936.

639103129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 613701529 + 25401600 = 24773^2 + 5040^2 .

It is not a de Polignac number, because 639103129 - 2¹⁷ = 638972057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 639103094 and 639103103.

It is not an unprimeable number, because it can be changed into a prime (639103169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147859 + ... + 152119.

It is an arithmetic number, because the mean of its divisors is an integer number (61988659).

Almost surely, 2^639103129 is an apocalyptic number.

It is an amenable number.

639103129 is a deficient number, since it is larger than the sum of its proper divisors (104760779).

639103129 is a wasteful number, since it uses less digits than its factorization.

639103129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7336 (or 7329 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 639103129 is about 25280.4890973256. The cubic root of 639103129 is about 861.3711357437.

The spelling of 639103129 in words is "six hundred thirty-nine million, one hundred three thousand, one hundred twenty-nine".