729855529 has 4 divisors (see below), whose sum is σ = 785998276. Its totient is φ = 673712784.

The previous prime is 729855523. The next prime is 729855551. The reversal of 729855529 is 925558927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 468289600 + 261565929 = 21640^2 + 16173^2 .

It is a cyclic number.

It is not a de Polignac number, because 729855529 - 2³ = 729855521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729855521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28071354 + ... + 28071379.

It is an arithmetic number, because the mean of its divisors is an integer number (196499569).

Almost surely, 2^729855529 is an apocalyptic number.

It is an amenable number.

729855529 is a deficient number, since it is larger than the sum of its proper divisors (56142747).

729855529 is a wasteful number, since it uses less digits than its factorization.

729855529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56142746.

The product of its digits is 2268000, while the sum is 52.

The square root of 729855529 is about 27015.8384841189. The cubic root of 729855529 is about 900.3519319115.

The spelling of 729855529 in words is "seven hundred twenty-nine million, eight hundred fifty-five thousand, five hundred twenty-nine".