729892161 has 32 divisors (see below), whose sum is σ = 1149206400. Its totient is φ = 456261120.

The previous prime is 729892153. The next prime is 729892211. The reversal of 729892161 is 161298927.

It is not a de Polignac number, because 729892161 - 2³ = 729892153 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (729892061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126150 + ... + 131808.

It is an arithmetic number, because the mean of its divisors is an integer number (35912700).

Almost surely, 2^729892161 is an apocalyptic number.

It is an amenable number.

729892161 is a deficient number, since it is larger than the sum of its proper divisors (419314239).

729892161 is a wasteful number, since it uses less digits than its factorization.

729892161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5966 (or 5960 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 729892161 is about 27016.5164482766. The cubic root of 729892161 is about 900.3669947739.

The spelling of 729892161 in words is "seven hundred twenty-nine million, eight hundred ninety-two thousand, one hundred sixty-one".