729969 has 8 divisors (see below), whose sum is σ = 991872. Its totient is φ = 477360.

The previous prime is 729947. The next prime is 729977. The reversal of 729969 is 969927.

729969 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 not a de Polignac number, because 729969 - 2⁸ = 729713 is a prime.

It is a super-2 number, since 2×729969² = 1065709481922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 729969.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 729969.

It is not an unprimeable number, because it can be changed into a prime (729919) 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, 2137 + ... + 2454.

It is an arithmetic number, because the mean of its divisors is an integer number (123984).

2⁷²⁹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

729969 is a deficient number, since it is larger than the sum of its proper divisors (261903).

729969 is a wasteful number, since it uses less digits than its factorization.

729969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4647.

The product of its digits is 61236, while the sum is 42.

The square root of 729969 is about 854.3822329613. The cubic root of 729969 is about 90.0398588880.

Subtracting from 729969 its sum of digits (42), we obtain a palindrome (729927).

The spelling of 729969 in words is "seven hundred twenty-nine thousand, nine hundred sixty-nine".