684533 has 4 divisors (see below), whose sum is σ = 688800. Its totient is φ = 680268.

The previous prime is 684527. The next prime is 684547. The reversal of 684533 is 335486.

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 a cyclic number.

It is not a de Polignac number, because 684533 - 2⁶ = 684469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684496 and 684505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684433) 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, 1883 + ... + 2216.

It is an arithmetic number, because the mean of its divisors is an integer number (172200).

2⁶⁸⁴⁵³³ is an apocalyptic number.

It is an amenable number.

684533 is a deficient number, since it is larger than the sum of its proper divisors (4267).

684533 is a wasteful number, since it uses less digits than its factorization.

684533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266.

The product of its digits is 8640, while the sum is 29.

The square root of 684533 is about 827.3650947435. The cubic root of 684533 is about 88.1315611365.

The spelling of 684533 in words is "six hundred eighty-four thousand, five hundred thirty-three".