2165729073 has 8 divisors (see below), whose sum is σ = 2909682336. Its totient is φ = 1432797600.

The previous prime is 2165729057. The next prime is 2165729087. The reversal of 2165729073 is 3709275612.

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

It is not a de Polignac number, because 2165729073 - 2⁴ = 2165729057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2165729173) 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 7 ways as a sum of consecutive naturals, for example, 2754988 + ... + 2755773.

It is an arithmetic number, because the mean of its divisors is an integer number (363710292).

Almost surely, 2^2165729073 is an apocalyptic number.

It is an amenable number.

2165729073 is a deficient number, since it is larger than the sum of its proper divisors (743953263).

2165729073 is a wasteful number, since it uses less digits than its factorization.

2165729073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510895.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 2165729073 is about 46537.3943512097. The cubic root of 2165729073 is about 1293.8026674538.

The spelling of 2165729073 in words is "two billion, one hundred sixty-five million, seven hundred twenty-nine thousand, seventy-three".