849989 has 8 divisors (see below), whose sum is σ = 1003008. Its totient is φ = 704880.

The previous prime is 849973. The next prime is 849991. The reversal of 849989 is 989948.

849989 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 a cyclic number.

It is not a de Polignac number, because 849989 - 2⁴ = 849973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840989) 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, 1742 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (125376).

2⁸⁴⁹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

849989 is a deficient number, since it is larger than the sum of its proper divisors (153019).

849989 is a wasteful number, since it uses less digits than its factorization.

849989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955.

The product of its digits is 186624, while the sum is 47.

The square root of 849989 is about 921.9484801224. The cubic root of 849989 is about 94.7264150913.

The spelling of 849989 in words is "eight hundred forty-nine thousand, nine hundred eighty-nine".