849685 has 4 divisors (see below), whose sum is σ = 1019628. Its totient is φ = 679744.

The previous prime is 849649. The next prime is 849691. The reversal of 849685 is 586948.

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 339889 + 509796 = 583^2 + 714^2 .

It is a cyclic number.

It is not a de Polignac number, because 849685 - 2¹⁵ = 816917 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84964 + ... + 84973.

It is an arithmetic number, because the mean of its divisors is an integer number (254907).

2⁸⁴⁹⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

849685 is a deficient number, since it is larger than the sum of its proper divisors (169943).

849685 is a wasteful number, since it uses less digits than its factorization.

849685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169942.

The product of its digits is 69120, while the sum is 40.

The square root of 849685 is about 921.7835971637. The cubic root of 849685 is about 94.7151207240.

The spelling of 849685 in words is "eight hundred forty-nine thousand, six hundred eighty-five".