506686 has 4 divisors (see below), whose sum is σ = 760032. Its totient is φ = 253342.

The previous prime is 506683. The next prime is 506687. The reversal of 506686 is 686605.

506686 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 686605 = 5 ⋅137321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126670 + ... + 126673.

It is an arithmetic number, because the mean of its divisors is an integer number (190008).

2⁵⁰⁶⁶⁸⁶ is an apocalyptic number.

506686 is a deficient number, since it is larger than the sum of its proper divisors (253346).

506686 is a wasteful number, since it uses less digits than its factorization.

506686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253345.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 506686 is about 711.8187971668. The cubic root of 506686 is about 79.7222660808.

The spelling of 506686 in words is "five hundred six thousand, six hundred eighty-six".