685533 has 4 divisors (see below), whose sum is σ = 914048. Its totient is φ = 457020.

The previous prime is 685519. The next prime is 685537. The reversal of 685533 is 335586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 685533 - 2¹⁸ = 423389 is a prime.

It is a D-number.

It is a Duffinian number.

685533 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 685533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114253 + ... + 114258.

It is an arithmetic number, because the mean of its divisors is an integer number (228512).

2⁶⁸⁵⁵³³ is an apocalyptic number.

It is an amenable number.

685533 is a deficient number, since it is larger than the sum of its proper divisors (228515).

685533 is a wasteful number, since it uses less digits than its factorization.

685533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228514.

The product of its digits is 10800, while the sum is 30.

The square root of 685533 is about 827.9692023258. The cubic root of 685533 is about 88.1744559179.

The spelling of 685533 in words is "six hundred eighty-five thousand, five hundred thirty-three".