442450568309 has 2 divisors, whose sum is σ = 442450568310. Its totient is φ = 442450568308.

The previous prime is 442450568291. The next prime is 442450568317. The reversal of 442450568309 is 903865054244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442095999409 + 354568900 = 664903^2 + 18830^2 .

It is a cyclic number.

It is not a de Polignac number, because 442450568309 - 2²⁸ = 442182132853 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 (442450568809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221225284154 + 221225284155.

It is an arithmetic number, because the mean of its divisors is an integer number (221225284155).

Almost surely, 2^442450568309 is an apocalyptic number.

It is an amenable number.

442450568309 is a deficient number, since it is larger than the sum of its proper divisors (1).

442450568309 is an equidigital number, since it uses as much as digits as its factorization.

442450568309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 442450568309 in words is "four hundred forty-two billion, four hundred fifty million, five hundred sixty-eight thousand, three hundred nine".