868791 has 16 divisors (see below), whose sum is σ = 1444608. Its totient is φ = 451200.

The previous prime is 868787. The next prime is 868793. The reversal of 868791 is 197868.

It is not a de Polignac number, because 868791 - 2² = 868787 is a prime.

868791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868793) 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 15 ways as a sum of consecutive naturals, for example, 1650 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (90288).

2⁸⁶⁸⁷⁹¹ is an apocalyptic number.

868791 is a deficient number, since it is larger than the sum of its proper divisors (575817).

868791 is a wasteful number, since it uses less digits than its factorization.

868791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782.

The product of its digits is 24192, while the sum is 39.

The square root of 868791 is about 932.0895879689. The cubic root of 868791 is about 95.4197859009.

It can be divided in two parts, 8687 and 91, that added together give a palindrome (8778).

The spelling of 868791 in words is "eight hundred sixty-eight thousand, seven hundred ninety-one".