523685 has 16 divisors (see below), whose sum is σ = 682992. Its totient is φ = 384000.

The previous prime is 523681. The next prime is 523717. The reversal of 523685 is 586325.

It can be written as a sum of positive squares in 8 ways, for example, as 2401 + 521284 = 49^2 + 722^2 .

It is not a de Polignac number, because 523685 - 2² = 523681 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 5⁴ + 2¹⁷ + 6⁴ + 3 + 8² + 5⁸ .

It is a nialpdrome in base 9.

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5135 + ... + 5235.

It is an arithmetic number, because the mean of its divisors is an integer number (42687).

2⁵²³⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

523685 is a deficient number, since it is larger than the sum of its proper divisors (159307).

523685 is a wasteful number, since it uses less digits than its factorization.

523685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184.

The product of its digits is 7200, while the sum is 29.

The square root of 523685 is about 723.6608321583. The cubic root of 523685 is about 80.6040217439.

The spelling of 523685 in words is "five hundred twenty-three thousand, six hundred eighty-five".