863543 has 4 divisors (see below), whose sum is σ = 886920. Its totient is φ = 840168.

The previous prime is 863539. The next prime is 863561. The reversal of 863543 is 345368.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 863543 - 2² = 863539 is a prime.

It is a d-powerful number, because it can be written as 8 + 6⁵ + 5⁵ + 3¹⁰ + 4⁹ + 3¹² .

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11633 + ... + 11706.

It is an arithmetic number, because the mean of its divisors is an integer number (221730).

2⁸⁶³⁵⁴³ is an apocalyptic number.

863543 is a deficient number, since it is larger than the sum of its proper divisors (23377).

863543 is a wasteful number, since it uses less digits than its factorization.

863543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23376.

The product of its digits is 8640, while the sum is 29.

The square root of 863543 is about 929.2701437149. The cubic root of 863543 is about 95.2272675111.

The spelling of 863543 in words is "eight hundred sixty-three thousand, five hundred forty-three".