8384336221 has 2 divisors, whose sum is σ = 8384336222. Its totient is φ = 8384336220.

The previous prime is 8384336141. The next prime is 8384336227. The reversal of 8384336221 is 1226334838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5872923225 + 2511412996 = 76635^2 + 50114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8384336221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8384336227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4192168110 + 4192168111.

It is an arithmetic number, because the mean of its divisors is an integer number (4192168111).

Almost surely, 2^8384336221 is an apocalyptic number.

It is an amenable number.

8384336221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8384336221 is an equidigital number, since it uses as much as digits as its factorization.

8384336221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 40.

The square root of 8384336221 is about 91566.0211049929. The cubic root of 8384336221 is about 2031.5283871152.

The spelling of 8384336221 in words is "eight billion, three hundred eighty-four million, three hundred thirty-six thousand, two hundred twenty-one".