864843 has 8 divisors (see below), whose sum is σ = 1317888. Its totient is φ = 494184.

The previous prime is 864817. The next prime is 864883. The reversal of 864843 is 348468.

864843 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 864843 - 2⁵ = 864811 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (864803) 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, 20571 + ... + 20612.

It is an arithmetic number, because the mean of its divisors is an integer number (164736).

2⁸⁶⁴⁸⁴³ is an apocalyptic number.

864843 is a deficient number, since it is larger than the sum of its proper divisors (453045).

864843 is a wasteful number, since it uses less digits than its factorization.

864843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41193.

The product of its digits is 18432, while the sum is 33.

The square root of 864843 is about 929.9693543338. The cubic root of 864843 is about 95.2750294168.

The spelling of 864843 in words is "eight hundred sixty-four thousand, eight hundred forty-three".