868599 has 12 divisors (see below), whose sum is σ = 1268176. Its totient is φ = 572832.

The previous prime is 868583. The next prime is 868603. The reversal of 868599 is 995868.

It is not a de Polignac number, because 868599 - 2⁴ = 868583 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 459 + ... + 1395.

2⁸⁶⁸⁵⁹⁹ is an apocalyptic number.

868599 is a deficient number, since it is larger than the sum of its proper divisors (399577).

868599 is a wasteful number, since it uses less digits than its factorization.

868599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 1043 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 868599 is about 931.9865878863. The cubic root of 868599 is about 95.4127562284.

It can be divided in two parts, 86859 and 9, that added together give a palindrome (86868).

The spelling of 868599 in words is "eight hundred sixty-eight thousand, five hundred ninety-nine".