685039003 has 4 divisors (see below), whose sum is σ = 747315288. Its totient is φ = 622762720.

The previous prime is 685039001. The next prime is 685039009. The reversal of 685039003 is 300930586.

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 685039003 - 2¹ = 685039001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 685039003.

It is not an unprimeable number, because it can be changed into a prime (685039001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31138126 + ... + 31138147.

It is an arithmetic number, because the mean of its divisors is an integer number (186828822).

Almost surely, 2^685039003 is an apocalyptic number.

685039003 is a deficient number, since it is larger than the sum of its proper divisors (62276285).

685039003 is a wasteful number, since it uses less digits than its factorization.

685039003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62276284.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 685039003 is about 26173.2497600126. The cubic root of 685039003 is about 881.5327124190.

Adding to 685039003 its reverse (300930586), we get a palindrome (985969589).

The spelling of 685039003 in words is "six hundred eighty-five million, thirty-nine thousand, three".