853989 has 16 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 540800.

The previous prime is 853981. The next prime is 853999. The reversal of 853989 is 989358.

It is a cyclic number.

It is not a de Polignac number, because 853989 - 2³ = 853981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 853989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6454 + ... + 6584.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2⁸⁵³⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

853989 is a deficient number, since it is larger than the sum of its proper divisors (343515).

853989 is a wasteful number, since it uses less digits than its factorization.

853989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228.

The product of its digits is 77760, while the sum is 42.

The square root of 853989 is about 924.1152525524. The cubic root of 853989 is about 94.8747749877.

The spelling of 853989 in words is "eight hundred fifty-three thousand, nine hundred eighty-nine".