442209841 has 2 divisors, whose sum is σ = 442209842. Its totient is φ = 442209840.

The previous prime is 442209751. The next prime is 442209853. The reversal of 442209841 is 148902244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426835600 + 15374241 = 20660^2 + 3921^2 .

It is a cyclic number.

It is not a de Polignac number, because 442209841 - 2⁹ = 442209329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442209797 and 442209806.

It is not a weakly prime, because it can be changed into another prime (442209881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221104920 + 221104921.

It is an arithmetic number, because the mean of its divisors is an integer number (221104921).

Almost surely, 2^442209841 is an apocalyptic number.

It is an amenable number.

442209841 is a deficient number, since it is larger than the sum of its proper divisors (1).

442209841 is an equidigital number, since it uses as much as digits as its factorization.

442209841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 442209841 is about 21028.7860087072. The cubic root of 442209841 is about 761.8616876381.

The spelling of 442209841 in words is "four hundred forty-two million, two hundred nine thousand, eight hundred forty-one".