506659 has 4 divisors (see below), whose sum is σ = 524160. Its totient is φ = 489160.

The previous prime is 506647. The next prime is 506663. The reversal of 506659 is 956605.

It is a happy number.

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 506659 - 2⁷ = 506531 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

506659 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 506659.

It is not an unprimeable number, because it can be changed into a prime (506609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8707 + ... + 8764.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

2⁵⁰⁶⁶⁵⁹ is an apocalyptic number.

506659 is a deficient number, since it is larger than the sum of its proper divisors (17501).

506659 is a wasteful number, since it uses less digits than its factorization.

506659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17500.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 506659 is about 711.7998314133. The cubic root of 506659 is about 79.7208499905.

The spelling of 506659 in words is "five hundred six thousand, six hundred fifty-nine".