685003705 has 4 divisors (see below), whose sum is σ = 822004452. Its totient is φ = 548002960.

The previous prime is 685003703. The next prime is 685003721. The reversal of 685003705 is 507300586.

It is a happy number.

685003705 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 can be written as a sum of positive squares in 2 ways, for example, as 180956304 + 504047401 = 13452^2 + 22451^2 .

It is not a de Polignac number, because 685003705 - 2¹ = 685003703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685003703) 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, 68500366 + ... + 68500375.

It is an arithmetic number, because the mean of its divisors is an integer number (205501113).

Almost surely, 2^685003705 is an apocalyptic number.

It is an amenable number.

685003705 is a deficient number, since it is larger than the sum of its proper divisors (137000747).

685003705 is a wasteful number, since it uses less digits than its factorization.

685003705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137000746.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 685003705 is about 26172.5754368958. The cubic root of 685003705 is about 881.5175712490.

The spelling of 685003705 in words is "six hundred eighty-five million, three thousand, seven hundred five".