849109 has 4 divisors (see below), whose sum is σ = 851904. Its totient is φ = 846316.

The previous prime is 849103. The next prime is 849119. The reversal of 849109 is 901948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 849109 - 2¹⁵ = 816341 is a prime.

It is a Smith number, since the sum of its digits (31) 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 not an unprimeable number, because it can be changed into a prime (849103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 877 + ... + 1570.

It is an arithmetic number, because the mean of its divisors is an integer number (212976).

2⁸⁴⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

849109 is a deficient number, since it is larger than the sum of its proper divisors (2795).

849109 is a wasteful number, since it uses less digits than its factorization.

849109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2794.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 849109 is about 921.4711064380. The cubic root of 849109 is about 94.6937134801.

The spelling of 849109 in words is "eight hundred forty-nine thousand, one hundred nine".