685803 has 4 divisors (see below), whose sum is σ = 914408. Its totient is φ = 457200.

The previous prime is 685793. The next prime is 685819. The reversal of 685803 is 308586.

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

It is not a de Polignac number, because 685803 - 2⁶ = 685739 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685803.

It is not an unprimeable number, because it can be changed into a prime (685103) 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, 114298 + ... + 114303.

It is an arithmetic number, because the mean of its divisors is an integer number (228602).

2⁶⁸⁵⁸⁰³ is an apocalyptic number.

685803 is a deficient number, since it is larger than the sum of its proper divisors (228605).

685803 is a wasteful number, since it uses less digits than its factorization.

685803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228604.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 685803 is about 828.1322358174. The cubic root of 685803 is about 88.1860303563.

It can be divided in two parts, 685 and 803, that multiplied together give a palindrome (550055).

The spelling of 685803 in words is "six hundred eighty-five thousand, eight hundred three".