8720443773 has 8 divisors (see below), whose sum is σ = 12919176000. Its totient is φ = 5813629164.

The previous prime is 8720443741. The next prime is 8720443793. The reversal of 8720443773 is 3773440278.

8720443773 is a `hidden beast` number, since 8 + 7 + 204 + 437 + 7 + 3 = 666.

8720443773 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8720443773 - 2⁵ = 8720443741 is a prime.

It is a super-2 number, since 2×8720443773² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720443723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161489673 + ... + 161489726.

It is an arithmetic number, because the mean of its divisors is an integer number (1614897000).

Almost surely, 2^8720443773 is an apocalyptic number.

It is an amenable number.

8720443773 is a deficient number, since it is larger than the sum of its proper divisors (4198732227).

8720443773 is a wasteful number, since it uses less digits than its factorization.

8720443773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322979408 (or 322979402 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 45.

The square root of 8720443773 is about 93383.3163525477. The cubic root of 8720443773 is about 2058.3198488840.

The spelling of 8720443773 in words is "eight billion, seven hundred twenty million, four hundred forty-three thousand, seven hundred seventy-three".