4421321309 has 2 divisors, whose sum is σ = 4421321310. Its totient is φ = 4421321308.

The previous prime is 4421321287. The next prime is 4421321323. The reversal of 4421321309 is 9031231244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2686348900 + 1734972409 = 51830^2 + 41653^2 .

It is a cyclic number.

It is not a de Polignac number, because 4421321309 - 2²⁸ = 4152885853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4421321609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2210660654 + 2210660655.

It is an arithmetic number, because the mean of its divisors is an integer number (2210660655).

Almost surely, 2^4421321309 is an apocalyptic number.

It is an amenable number.

4421321309 is a deficient number, since it is larger than the sum of its proper divisors (1).

4421321309 is an equidigital number, since it uses as much as digits as its factorization.

4421321309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 4421321309 is about 66493.0169942679. The cubic root of 4421321309 is about 1641.2850958802.

The spelling of 4421321309 in words is "four billion, four hundred twenty-one million, three hundred twenty-one thousand, three hundred nine".