685743 has 4 divisors (see below), whose sum is σ = 914328. Its totient is φ = 457160.

The previous prime is 685739. The next prime is 685747. The reversal of 685743 is 347586.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (685739) and next prime (685747).

It is a cyclic number.

It is not a de Polignac number, because 685743 - 2² = 685739 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685747) 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, 114288 + ... + 114293.

It is an arithmetic number, because the mean of its divisors is an integer number (228582).

2⁶⁸⁵⁷⁴³ is an apocalyptic number.

685743 is a deficient number, since it is larger than the sum of its proper divisors (228585).

685743 is a wasteful number, since it uses less digits than its factorization.

685743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228584.

The product of its digits is 20160, while the sum is 33.

The square root of 685743 is about 828.0960089265. The cubic root of 685743 is about 88.1834585214.

The spelling of 685743 in words is "six hundred eighty-five thousand, seven hundred forty-three".