813849 has 8 divisors (see below), whose sum is σ = 1101600. Its totient is φ = 534336.

The previous prime is 813847. The next prime is 813863. The reversal of 813849 is 948318.

813849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 813849 - 2¹ = 813847 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 813849.

It is not an unprimeable number, because it can be changed into a prime (813847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1824 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (137700).

2⁸¹³⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

813849 is a deficient number, since it is larger than the sum of its proper divisors (287751).

813849 is a wasteful number, since it uses less digits than its factorization.

813849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119.

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

The square root of 813849 is about 902.1357990901. The cubic root of 813849 is about 93.3643930074.

The spelling of 813849 in words is "eight hundred thirteen thousand, eight hundred forty-nine".