868729 has 8 divisors (see below), whose sum is σ = 902880. Its totient is φ = 835296.

The previous prime is 868727. The next prime is 868739. The reversal of 868729 is 927868.

868729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 868729 - 2¹ = 868727 is a prime.

It is a Duffinian number.

868729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 868691 and 868700.

It is not an unprimeable number, because it can be changed into a prime (868727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3714 + ... + 3940.

It is an arithmetic number, because the mean of its divisors is an integer number (112860).

2⁸⁶⁸⁷²⁹ is an apocalyptic number.

868729 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

868729 is a deficient number, since it is larger than the sum of its proper divisors (34151).

868729 is a wasteful number, since it uses less digits than its factorization.

868729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its digits is 48384, while the sum is 40.

The square root of 868729 is about 932.0563287699. The cubic root of 868729 is about 95.4175160157.

The spelling of 868729 in words is "eight hundred sixty-eight thousand, seven hundred twenty-nine".