8927793221 has 2 divisors, whose sum is σ = 8927793222. Its totient is φ = 8927793220.

The previous prime is 8927793167. The next prime is 8927793223. The reversal of 8927793221 is 1223977298.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8691832900 + 235960321 = 93230^2 + 15361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8927793221 is a prime.

Together with 8927793223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8927793221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8927793223) 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 as a sum of consecutive naturals, namely, 4463896610 + 4463896611.

It is an arithmetic number, because the mean of its divisors is an integer number (4463896611).

Almost surely, 2^8927793221 is an apocalyptic number.

It is an amenable number.

8927793221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8927793221 is an equidigital number, since it uses as much as digits as its factorization.

8927793221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 8927793221 is about 94487.0002751701. Note that the first 3 decimals coincide. The cubic root of 8927793221 is about 2074.5060591172.

The spelling of 8927793221 in words is "eight billion, nine hundred twenty-seven million, seven hundred ninety-three thousand, two hundred twenty-one".