659939 has 8 divisors (see below), whose sum is σ = 787200. Its totient is φ = 540936.

The previous prime is 659917. The next prime is 659941. The reversal of 659939 is 939956.

It is a happy number.

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 659939 - 2¹⁶ = 594403 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 659896 and 659905.

It is not an unprimeable number, because it can be changed into a prime (659999) 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, 1889 + ... + 2210.

It is an arithmetic number, because the mean of its divisors is an integer number (98400).

2⁶⁵⁹⁹³⁹ is an apocalyptic number.

659939 is a deficient number, since it is larger than the sum of its proper divisors (127261).

659939 is a wasteful number, since it uses less digits than its factorization.

659939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129.

The product of its digits is 65610, while the sum is 41.

The square root of 659939 is about 812.3662966913. The cubic root of 659939 is about 87.0631944965.

The spelling of 659939 in words is "six hundred fifty-nine thousand, nine hundred thirty-nine".