442008841 has 2 divisors, whose sum is σ = 442008842. Its totient is φ = 442008840.

The previous prime is 442008839. The next prime is 442008869. The reversal of 442008841 is 148800244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440790025 + 1218816 = 20995^2 + 1104^2 .

It is a cyclic number.

It is not a de Polignac number, because 442008841 - 2¹ = 442008839 is a prime.

Together with 442008839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (442000841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221004420 + 221004421.

It is an arithmetic number, because the mean of its divisors is an integer number (221004421).

Almost surely, 2^442008841 is an apocalyptic number.

It is an amenable number.

442008841 is a deficient number, since it is larger than the sum of its proper divisors (1).

442008841 is an equidigital number, since it uses as much as digits as its factorization.

442008841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 442008841 is about 21024.0063023202. The cubic root of 442008841 is about 761.7462391243.

The spelling of 442008841 in words is "four hundred forty-two million, eight thousand, eight hundred forty-one".