864943 has 8 divisors (see below), whose sum is σ = 928368. Its totient is φ = 802944.

The previous prime is 864917. The next prime is 864947. The reversal of 864943 is 349468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 864943 - 2⁵ = 864911 is a prime.

It is a Duffinian number.

864943 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 864899 and 864908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864947) 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, 1105 + ... + 1717.

It is an arithmetic number, because the mean of its divisors is an integer number (116046).

2⁸⁶⁴⁹⁴³ is an apocalyptic number.

864943 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

864943 is a deficient number, since it is larger than the sum of its proper divisors (63425).

864943 is a wasteful number, since it uses less digits than its factorization.

864943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713.

The product of its digits is 20736, while the sum is 34.

The square root of 864943 is about 930.0231179922. The cubic root of 864943 is about 95.2787014265.

The spelling of 864943 in words is "eight hundred sixty-four thousand, nine hundred forty-three".