729160865 has 8 divisors (see below), whose sum is σ = 886979688. Its totient is φ = 575337600.

The previous prime is 729160843. The next prime is 729160871. The reversal of 729160865 is 568061927.

729160865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7862416 + 721298449 = 2804^2 + 26857^2 .

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

It is not a de Polignac number, because 729160865 - 2⁶ = 729160801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 998486 + ... + 999215.

It is an arithmetic number, because the mean of its divisors is an integer number (110872461).

Almost surely, 2^729160865 is an apocalyptic number.

It is an amenable number.

729160865 is a deficient number, since it is larger than the sum of its proper divisors (157818823).

729160865 is a wasteful number, since it uses less digits than its factorization.

729160865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997779.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 729160865 is about 27002.9788171602. The cubic root of 729160865 is about 900.0661947198.

The spelling of 729160865 in words is "seven hundred twenty-nine million, one hundred sixty thousand, eight hundred sixty-five".