849681 has 12 divisors (see below), whose sum is σ = 1402752. Its totient is φ = 485496.

The previous prime is 849649. The next prime is 849691. The reversal of 849681 is 186948.

It is a happy number.

It is not a de Polignac number, because 849681 - 2⁵ = 849649 is a prime.

It is a super-2 number, since 2×849681² = 1443915603522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (849601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6681 + ... + 6806.

It is an arithmetic number, because the mean of its divisors is an integer number (116896).

2⁸⁴⁹⁶⁸¹ is an apocalyptic number.

It is an amenable number.

849681 is a deficient number, since it is larger than the sum of its proper divisors (553071).

849681 is a wasteful number, since it uses less digits than its factorization.

849681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13500 (or 13497 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 849681 is about 921.7814274545. The cubic root of 849681 is about 94.7149720959.

The spelling of 849681 in words is "eight hundred forty-nine thousand, six hundred eighty-one".