442085797889 has 2 divisors, whose sum is σ = 442085797890. Its totient is φ = 442085797888.

The previous prime is 442085797883. The next prime is 442085797891. The reversal of 442085797889 is 988797580244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279206560000 + 162879237889 = 528400^2 + 403583^2 .

It is a cyclic number.

It is not a de Polignac number, because 442085797889 - 2²⁰ = 442084749313 is a prime.

Together with 442085797891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (442085797883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221042898944 + 221042898945.

It is an arithmetic number, because the mean of its divisors is an integer number (221042898945).

Almost surely, 2^442085797889 is an apocalyptic number.

It is an amenable number.

442085797889 is a deficient number, since it is larger than the sum of its proper divisors (1).

442085797889 is an equidigital number, since it uses as much as digits as its factorization.

442085797889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 325140480, while the sum is 71.

The spelling of 442085797889 in words is "four hundred forty-two billion, eighty-five million, seven hundred ninety-seven thousand, eight hundred eighty-nine".