639035 has 4 divisors (see below), whose sum is σ = 766848. Its totient is φ = 511224.

The previous prime is 639011. The next prime is 639043. The reversal of 639035 is 530936.

639035 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 639035 - 2⁶ = 638971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 638995 and 639013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63899 + ... + 63908.

It is an arithmetic number, because the mean of its divisors is an integer number (191712).

2⁶³⁹⁰³⁵ is an apocalyptic number.

639035 is a deficient number, since it is larger than the sum of its proper divisors (127813).

639035 is a wasteful number, since it uses less digits than its factorization.

639035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127812.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 639035 is about 799.3966474786. The cubic root of 639035 is about 86.1340526996.

The spelling of 639035 in words is "six hundred thirty-nine thousand, thirty-five".