8650707921 has 6 divisors (see below), whose sum is σ = 12495467010. Its totient is φ = 5767138608.

The previous prime is 8650707913. The next prime is 8650707943. The reversal of 8650707921 is 1297070568.

8650707921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6629216400 + 2021491521 = 81420^2 + 44961^2 .

It is not a de Polignac number, because 8650707921 - 2³ = 8650707913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8650707911) 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 5 ways as a sum of consecutive naturals, for example, 480594876 + ... + 480594893.

It is an arithmetic number, because the mean of its divisors is an integer number (2082577835).

Almost surely, 2^8650707921 is an apocalyptic number.

It is an amenable number.

8650707921 is a deficient number, since it is larger than the sum of its proper divisors (3844759089).

8650707921 is a wasteful number, since it uses less digits than its factorization.

8650707921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961189775 (or 961189772 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 8650707921 is about 93009.1819177010. The cubic root of 8650707921 is about 2052.8184845450.

The spelling of 8650707921 in words is "eight billion, six hundred fifty million, seven hundred seven thousand, nine hundred twenty-one".