729616073 has 4 divisors (see below), whose sum is σ = 743382468. Its totient is φ = 715849680.

The previous prime is 729616067. The next prime is 729616091. The reversal of 729616073 is 370616927.

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 497602249 + 232013824 = 22307^2 + 15232^2 .

It is a cyclic number.

It is not a de Polignac number, because 729616073 - 2⁴ = 729616057 is a prime.

It is a super-2 number, since 2×729616073² = 1064679227959882658, which contains 22 as substring.

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 729616073.

It is not an unprimeable number, because it can be changed into a prime (729616003) 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 3 ways as a sum of consecutive naturals, for example, 6883118 + ... + 6883223.

It is an arithmetic number, because the mean of its divisors is an integer number (185845617).

Almost surely, 2^729616073 is an apocalyptic number.

It is an amenable number.

729616073 is a deficient number, since it is larger than the sum of its proper divisors (13766395).

729616073 is a wasteful number, since it uses less digits than its factorization.

729616073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13766394.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 729616073 is about 27011.4063499108. The cubic root of 729616073 is about 900.2534565988.

The spelling of 729616073 in words is "seven hundred twenty-nine million, six hundred sixteen thousand, seventy-three".