685102203 has 12 divisors (see below), whose sum is σ = 995665320. Its totient is φ = 453931776.

The previous prime is 685102189. The next prime is 685102207. The reversal of 685102203 is 302201586.

It is not a de Polignac number, because 685102203 - 2¹² = 685098107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685102207) 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 11 ways as a sum of consecutive naturals, for example, 232038 + ... + 234971.

It is an arithmetic number, because the mean of its divisors is an integer number (82972110).

Almost surely, 2^685102203 is an apocalyptic number.

685102203 is a deficient number, since it is larger than the sum of its proper divisors (310563117).

685102203 is a wasteful number, since it uses less digits than its factorization.

685102203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467178 (or 467175 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 685102203 is about 26174.4570717331. The cubic root of 685102203 is about 881.5598209262.

Adding to 685102203 its reverse (302201586), we get a palindrome (987303789).

The spelling of 685102203 in words is "six hundred eighty-five million, one hundred two thousand, two hundred three".