685443 has 8 divisors (see below), whose sum is σ = 997056. Its totient is φ = 415400.

The previous prime is 685429. The next prime is 685453. The reversal of 685443 is 344586.

685443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 685443 - 2⁴ = 685427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685443.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685443.

It is not an unprimeable number, because it can be changed into a prime (685453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10353 + ... + 10418.

It is an arithmetic number, because the mean of its divisors is an integer number (124632).

2⁶⁸⁵⁴⁴³ is an apocalyptic number.

685443 is a deficient number, since it is larger than the sum of its proper divisors (311613).

685443 is a wasteful number, since it uses less digits than its factorization.

685443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20785.

The product of its digits is 11520, while the sum is 30.

The square root of 685443 is about 827.9148506942. The cubic root of 685443 is about 88.1705970965.

It can be divided in two parts, 685 and 443, that added together give a triangular number (1128 = T₄₇).

The spelling of 685443 in words is "six hundred eighty-five thousand, four hundred forty-three".