685243443 has 8 divisors (see below), whose sum is σ = 914204368. Its totient is φ = 456555744.

The previous prime is 685243423. The next prime is 685243453. The reversal of 685243443 is 344342586.

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

It is not a de Polignac number, because 685243443 - 2⁵ = 685243411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685243423) 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, 62380 + ... + 72537.

It is an arithmetic number, because the mean of its divisors is an integer number (114275546).

Almost surely, 2^685243443 is an apocalyptic number.

685243443 is a deficient number, since it is larger than the sum of its proper divisors (228960925).

685243443 is a wasteful number, since it uses less digits than its factorization.

685243443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136613.

The product of its digits is 276480, while the sum is 39.

The square root of 685243443 is about 26177.1549829236. The cubic root of 685243443 is about 881.6203972671.

The spelling of 685243443 in words is "six hundred eighty-five million, two hundred forty-three thousand, four hundred forty-three".