4449384221 has 2 divisors, whose sum is σ = 4449384222. Its totient is φ = 4449384220.

The previous prime is 4449384187. The next prime is 4449384253. The reversal of 4449384221 is 1224839444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2267092996 + 2182291225 = 47614^2 + 46715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4449384221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4449384281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2224692110 + 2224692111.

It is an arithmetic number, because the mean of its divisors is an integer number (2224692111).

Almost surely, 2^4449384221 is an apocalyptic number.

It is an amenable number.

4449384221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4449384221 is an equidigital number, since it uses as much as digits as its factorization.

4449384221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 41.

The square root of 4449384221 is about 66703.7047022128. The cubic root of 4449384221 is about 1644.7502841842.

The spelling of 4449384221 in words is "four billion, four hundred forty-nine million, three hundred eighty-four thousand, two hundred twenty-one".