729189 has 16 divisors (see below), whose sum is σ = 1094400. Its totient is φ = 479808.

The previous prime is 729187. The next prime is 729191. The reversal of 729189 is 981927.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (729187) and next prime (729191).

It is not a de Polignac number, because 729189 - 2¹ = 729187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2932 + ... + 3170.

It is an arithmetic number, because the mean of its divisors is an integer number (68400).

2⁷²⁹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

729189 is a deficient number, since it is larger than the sum of its proper divisors (365211).

729189 is a wasteful number, since it uses less digits than its factorization.

729189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 355 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 729189 is about 853.9256407908. The cubic root of 729189 is about 90.0077771057.

It can be divided in two parts, 72918 and 9, that added together give a palindrome (72927).

The spelling of 729189 in words is "seven hundred twenty-nine thousand, one hundred eighty-nine".