685163 has 4 divisors (see below), whose sum is σ = 688248. Its totient is φ = 682080.

The previous prime is 685141. The next prime is 685169. The reversal of 685163 is 361586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361586 = 2 ⋅180793.

It is a cyclic number.

It is not a de Polignac number, because 685163 - 2⁶ = 685099 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685163.

It is not an unprimeable number, because it can be changed into a prime (685169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181 + ... + 1662.

It is an arithmetic number, because the mean of its divisors is an integer number (172062).

2⁶⁸⁵¹⁶³ is an apocalyptic number.

685163 is a deficient number, since it is larger than the sum of its proper divisors (3085).

685163 is a wasteful number, since it uses less digits than its factorization.

685163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084.

The product of its digits is 4320, while the sum is 29.

The square root of 685163 is about 827.7457339063. The cubic root of 685163 is about 88.1585897136.

It can be divided in two parts, 685 and 163, that added together give a palindrome (848).

The spelling of 685163 in words is "six hundred eighty-five thousand, one hundred sixty-three".