849813 has 16 divisors (see below), whose sum is σ = 1264320. Its totient is φ = 504576.

The previous prime is 849773. The next prime is 849829. The reversal of 849813 is 318948.

It is not a de Polignac number, because 849813 - 2⁹ = 849301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (79020).

2⁸⁴⁹⁸¹³ is an apocalyptic number.

It is an amenable number.

849813 is a deficient number, since it is larger than the sum of its proper divisors (414507).

849813 is a wasteful number, since it uses less digits than its factorization.

849813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916.

The product of its digits is 6912, while the sum is 33.

The square root of 849813 is about 921.8530251618. The cubic root of 849813 is about 94.7198765754.

The spelling of 849813 in words is "eight hundred forty-nine thousand, eight hundred thirteen".