864789143 has 8 divisors (see below), whose sum is σ = 883638720. Its totient is φ = 845958400.

The previous prime is 864789139. The next prime is 864789187. The reversal of 864789143 is 341987468.

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 864789143 - 2² = 864789139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 864789091 and 864789100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864789103) 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, 128363 + ... + 134931.

It is an arithmetic number, because the mean of its divisors is an integer number (110454840).

Almost surely, 2^864789143 is an apocalyptic number.

864789143 is a deficient number, since it is larger than the sum of its proper divisors (18849577).

864789143 is a wasteful number, since it uses less digits than its factorization.

864789143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9417.

The product of its digits is 1161216, while the sum is 50.

The square root of 864789143 is about 29407.2974446820. The cubic root of 864789143 is about 952.7305166525.

The spelling of 864789143 in words is "eight hundred sixty-four million, seven hundred eighty-nine thousand, one hundred forty-three".