729855449 has 4 divisors (see below), whose sum is σ = 729983460. Its totient is φ = 729727440.

The previous prime is 729855431. The next prime is 729855457. The reversal of 729855449 is 944558927.

729855449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944558927 = 13 ⋅72658379.

It can be written as a sum of positive squares in 2 ways, for example, as 45091225 + 684764224 = 6715^2 + 26168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729855449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 729855449.

It is not an unprimeable number, because it can be changed into a prime (729855409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55034 + ... + 66995.

It is an arithmetic number, because the mean of its divisors is an integer number (182495865).

Almost surely, 2^729855449 is an apocalyptic number.

It is an amenable number.

729855449 is a deficient number, since it is larger than the sum of its proper divisors (128011).

729855449 is a wasteful number, since it uses less digits than its factorization.

729855449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128010.

The product of its digits is 3628800, while the sum is 53.

The square root of 729855449 is about 27015.8370035059. The cubic root of 729855449 is about 900.3518990155.

The spelling of 729855449 in words is "seven hundred twenty-nine million, eight hundred fifty-five thousand, four hundred forty-nine".