523686 has 8 divisors (see below), whose sum is σ = 1047384. Its totient is φ = 174560.

The previous prime is 523681. The next prime is 523717. The reversal of 523686 is 686325.

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

523686 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523681) by changing a digit.

523686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43635 + ... + 43646.

It is an arithmetic number, because the mean of its divisors is an integer number (130923).

2⁵²³⁶⁸⁶ is an apocalyptic number.

523686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

523686 is a wasteful number, since it uses less digits than its factorization.

523686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87286.

The product of its digits is 8640, while the sum is 30.

The square root of 523686 is about 723.6615230894. The cubic root of 523686 is about 80.6040730496.

The spelling of 523686 in words is "five hundred twenty-three thousand, six hundred eighty-six".