8404116221 has 2 divisors, whose sum is σ = 8404116222. Its totient is φ = 8404116220.

The previous prime is 8404116199. The next prime is 8404116241. The reversal of 8404116221 is 1226114048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6101172100 + 2302944121 = 78110^2 + 47989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8404116221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8404116241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4202058110 + 4202058111.

It is an arithmetic number, because the mean of its divisors is an integer number (4202058111).

Almost surely, 2^8404116221 is an apocalyptic number.

It is an amenable number.

8404116221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8404116221 is an equidigital number, since it uses as much as digits as its factorization.

8404116221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 8404116221 is about 91673.9669753633. The cubic root of 8404116221 is about 2033.1247000454.

The spelling of 8404116221 in words is "eight billion, four hundred four million, one hundred sixteen thousand, two hundred twenty-one".