849689 has 4 divisors (see below), whose sum is σ = 886656. Its totient is φ = 812724.

The previous prime is 849649. The next prime is 849691. The reversal of 849689 is 986948.

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 849689 - 2¹⁶ = 784153 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (849649) 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, 18449 + ... + 18494.

It is an arithmetic number, because the mean of its divisors is an integer number (221664).

2⁸⁴⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

849689 is a deficient number, since it is larger than the sum of its proper divisors (36967).

849689 is a wasteful number, since it uses less digits than its factorization.

849689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36966.

The product of its digits is 124416, while the sum is 44.

The square root of 849689 is about 921.7857668678. The cubic root of 849689 is about 94.7152693516.

The spelling of 849689 in words is "eight hundred forty-nine thousand, six hundred eighty-nine".