868829 has 12 divisors (see below), whose sum is σ = 968436. Its totient is φ = 778752.

The previous prime is 868817. The next prime is 868841. The reversal of 868829 is 928868.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (868817) and next prime (868841).

It can be written as a sum of positive squares in 6 ways, for example, as 76729 + 792100 = 277^2 + 890^2 .

It is not a de Polignac number, because 868829 - 2¹² = 864733 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 (868849) 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, 8909 + ... + 9005.

It is an arithmetic number, because the mean of its divisors is an integer number (80703).

2⁸⁶⁸⁸²⁹ is an apocalyptic number.

It is an amenable number.

868829 is a deficient number, since it is larger than the sum of its proper divisors (99607).

868829 is a wasteful number, since it uses less digits than its factorization.

868829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 163 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 868829 is about 932.1099720527. The cubic root of 868829 is about 95.4211770675.

The spelling of 868829 in words is "eight hundred sixty-eight thousand, eight hundred twenty-nine".