8720120173 has 8 divisors (see below), whose sum is σ = 8989401600. Its totient is φ = 8454888288.

The previous prime is 8720120161. The next prime is 8720120179. The reversal of 8720120173 is 3710210278.

8720120173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8720120173 - 2⁵ = 8720120141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720120179) 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 7 ways as a sum of consecutive naturals, for example, 1008013 + ... + 1016626.

It is an arithmetic number, because the mean of its divisors is an integer number (1123675200).

Almost surely, 2^8720120173 is an apocalyptic number.

It is an amenable number.

8720120173 is a deficient number, since it is larger than the sum of its proper divisors (269281427).

8720120173 is a wasteful number, since it uses less digits than its factorization.

8720120173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024771.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 8720120173 is about 93381.5836929317. The cubic root of 8720120173 is about 2058.2943883853.

The spelling of 8720120173 in words is "eight billion, seven hundred twenty million, one hundred twenty thousand, one hundred seventy-three".