442444021309 has 2 divisors, whose sum is σ = 442444021310. Its totient is φ = 442444021308.

The previous prime is 442444021291. The next prime is 442444021333. The reversal of 442444021309 is 903120444244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254389096900 + 188054924409 = 504370^2 + 433653^2 .

It is a cyclic number.

It is not a de Polignac number, because 442444021309 - 2¹¹ = 442444019261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442444021399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221222010654 + 221222010655.

It is an arithmetic number, because the mean of its divisors is an integer number (221222010655).

Almost surely, 2^442444021309 is an apocalyptic number.

It is an amenable number.

442444021309 is a deficient number, since it is larger than the sum of its proper divisors (1).

442444021309 is an equidigital number, since it uses as much as digits as its factorization.

442444021309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 442444021309 in words is "four hundred forty-two billion, four hundred forty-four million, twenty-one thousand, three hundred nine".