729392161 has 8 divisors (see below), whose sum is σ = 742246560. Its totient is φ = 716554272.

The previous prime is 729392141. The next prime is 729392219. The reversal of 729392161 is 161293927.

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

It is a cyclic number.

It is not a de Polignac number, because 729392161 - 2¹⁷ = 729261089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729392141) 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, 114486 + ... + 120688.

It is an arithmetic number, because the mean of its divisors is an integer number (92780820).

Almost surely, 2^729392161 is an apocalyptic number.

It is an amenable number.

729392161 is a deficient number, since it is larger than the sum of its proper divisors (12854399).

729392161 is a wasteful number, since it uses less digits than its factorization.

729392161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8255.

The product of its digits is 40824, while the sum is 40.

The square root of 729392161 is about 27007.2612643341. The cubic root of 729392161 is about 900.1613541979.

The spelling of 729392161 in words is "seven hundred twenty-nine million, three hundred ninety-two thousand, one hundred sixty-one".