442440997717 has 2 divisors, whose sum is σ = 442440997718. Its totient is φ = 442440997716.

The previous prime is 442440997619. The next prime is 442440997729. The reversal of 442440997717 is 717799044244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358242949156 + 84198048561 = 598534^2 + 290169^2 .

It is a cyclic number.

It is not a de Polignac number, because 442440997717 - 2¹⁵ = 442440964949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442440997777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221220498858 + 221220498859.

It is an arithmetic number, because the mean of its divisors is an integer number (221220498859).

Almost surely, 2^442440997717 is an apocalyptic number.

It is an amenable number.

442440997717 is a deficient number, since it is larger than the sum of its proper divisors (1).

442440997717 is an equidigital number, since it uses as much as digits as its factorization.

442440997717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14224896, while the sum is 58.

The spelling of 442440997717 in words is "four hundred forty-two billion, four hundred forty million, nine hundred ninety-seven thousand, seven hundred seventeen".