639063 has 8 divisors (see below), whose sum is σ = 946800. Its totient is φ = 426024.

The previous prime is 639053. The next prime is 639083. The reversal of 639063 is 360936.

It is not a de Polignac number, because 639063 - 2⁶ = 638999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 23669 = 639063 / (6 + 3 + 9 + 0 + 6 + 3).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639043) 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, 11808 + ... + 11861.

It is an arithmetic number, because the mean of its divisors is an integer number (118350).

2⁶³⁹⁰⁶³ is an apocalyptic number.

639063 is a deficient number, since it is larger than the sum of its proper divisors (307737).

639063 is a wasteful number, since it uses less digits than its factorization.

639063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23678 (or 23672 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 639063 is about 799.4141604950. The cubic root of 639063 is about 86.1353106997.

Adding to 639063 its reverse (360936), we get a palindrome (999999).

The spelling of 639063 in words is "six hundred thirty-nine thousand, sixty-three".