868539 has 16 divisors (see below), whose sum is σ = 1347840. Its totient is φ = 487200.

The previous prime is 868537. The next prime is 868559. The reversal of 868539 is 935868.

868539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 868539 - 2¹ = 868537 is a prime.

It is a d-powerful number, because it can be written as 8² + 6³ + 5⁶ + 8⁶ + 3¹² + 9⁵ .

868539 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 868497 and 868506.

It is not an unprimeable number, because it can be changed into a prime (868531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 889 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2⁸⁶⁸⁵³⁹ is an apocalyptic number.

868539 is a deficient number, since it is larger than the sum of its proper divisors (479301).

868539 is a wasteful number, since it uses less digits than its factorization.

868539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770.

The product of its digits is 51840, while the sum is 39.

The square root of 868539 is about 931.9543980260. The cubic root of 868539 is about 95.4105592433.

The spelling of 868539 in words is "eight hundred sixty-eight thousand, five hundred thirty-nine".