442375297981 has 2 divisors, whose sum is σ = 442375297982. Its totient is φ = 442375297980.

The previous prime is 442375297979. The next prime is 442375298023. The reversal of 442375297981 is 189792573244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367029988900 + 75345309081 = 605830^2 + 274491^2 .

It is a cyclic number.

It is not a de Polignac number, because 442375297981 - 2¹ = 442375297979 is a prime.

It is a super-2 number, since 2×442375297981² (a number of 24 digits) contains 22 as substring.

Together with 442375297979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442375997981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221187648990 + 221187648991.

It is an arithmetic number, because the mean of its divisors is an integer number (221187648991).

Almost surely, 2^442375297981 is an apocalyptic number.

It is an amenable number.

442375297981 is a deficient number, since it is larger than the sum of its proper divisors (1).

442375297981 is an equidigital number, since it uses as much as digits as its factorization.

442375297981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 61.

The spelling of 442375297981 in words is "four hundred forty-two billion, three hundred seventy-five million, two hundred ninety-seven thousand, nine hundred eighty-one".