729581649 has 8 divisors (see below), whose sum is σ = 973883232. Its totient is φ = 485833920.

The previous prime is 729581603. The next prime is 729581701. The reversal of 729581649 is 946185927.

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

It is not a de Polignac number, because 729581649 - 2¹¹ = 729579601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (729581849) 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, 135379 + ... + 140664.

It is an arithmetic number, because the mean of its divisors is an integer number (121735404).

Almost surely, 2^729581649 is an apocalyptic number.

It is an amenable number.

729581649 is a deficient number, since it is larger than the sum of its proper divisors (244301583).

729581649 is a wasteful number, since it uses less digits than its factorization.

729581649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276927.

The product of its digits is 1088640, while the sum is 51.

The square root of 729581649 is about 27010.7691301081. The cubic root of 729581649 is about 900.2392980966.

The spelling of 729581649 in words is "seven hundred twenty-nine million, five hundred eighty-one thousand, six hundred forty-nine".