639359 has 8 divisors (see below), whose sum is σ = 736800. Its totient is φ = 543456.

The previous prime is 639337. The next prime is 639361. The reversal of 639359 is 953936.

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

It is a cyclic number.

It is not a de Polignac number, because 639359 - 2¹² = 635263 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 639359.

It is not an unprimeable number, because it can be changed into a prime (639329) 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, 737 + ... + 1349.

It is an arithmetic number, because the mean of its divisors is an integer number (92100).

2⁶³⁹³⁵⁹ is an apocalyptic number.

639359 is a deficient number, since it is larger than the sum of its proper divisors (97441).

639359 is a wasteful number, since it uses less digits than its factorization.

639359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769.

The product of its digits is 21870, while the sum is 35.

The square root of 639359 is about 799.5992746370. The cubic root of 639359 is about 86.1486073108.

The spelling of 639359 in words is "six hundred thirty-nine thousand, three hundred fifty-nine".