685445803 has 4 divisors (see below), whose sum is σ = 783366640. Its totient is φ = 587524968.

The previous prime is 685445801. The next prime is 685445819. The reversal of 685445803 is 308544586.

685445803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 685445803 - 2¹ = 685445801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685445803.

It is not an unprimeable number, because it can be changed into a prime (685445801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48960408 + ... + 48960421.

It is an arithmetic number, because the mean of its divisors is an integer number (195841660).

Almost surely, 2^685445803 is an apocalyptic number.

685445803 is a deficient number, since it is larger than the sum of its proper divisors (97920837).

685445803 is an equidigital number, since it uses as much as digits as its factorization.

685445803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97920836.

The product of its (nonzero) digits is 460800, while the sum is 43.

The square root of 685445803 is about 26181.0198999199. The cubic root of 685445803 is about 881.7071728243.

It can be divided in two parts, 68544 and 5803, that added together give a palindrome (74347).

The spelling of 685445803 in words is "six hundred eighty-five million, four hundred forty-five thousand, eight hundred three".