729184561 has 8 divisors (see below), whose sum is σ = 837305024. Its totient is φ = 622051920.

The previous prime is 729184537. The next prime is 729184627. The reversal of 729184561 is 165481927.

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

It is not a de Polignac number, because 729184561 - 2⁵ = 729184529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729184861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245370 + ... + 248323.

It is an arithmetic number, because the mean of its divisors is an integer number (104663128).

Almost surely, 2^729184561 is an apocalyptic number.

It is an amenable number.

729184561 is a deficient number, since it is larger than the sum of its proper divisors (108120463).

729184561 is a wasteful number, since it uses less digits than its factorization.

729184561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493911.

The product of its digits is 120960, while the sum is 43.

The square root of 729184561 is about 27003.4175800027. The cubic root of 729184561 is about 900.0759446202.

The spelling of 729184561 in words is "seven hundred twenty-nine million, one hundred eighty-four thousand, five hundred sixty-one".