442004023 has 2 divisors, whose sum is σ = 442004024. Its totient is φ = 442004022.

The previous prime is 442003999. The next prime is 442004081. The reversal of 442004023 is 320400244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442004023 - 2¹³ = 441995831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442004083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221002011 + 221002012.

It is an arithmetic number, because the mean of its divisors is an integer number (221002012).

Almost surely, 2^442004023 is an apocalyptic number.

442004023 is a deficient number, since it is larger than the sum of its proper divisors (1).

442004023 is an equidigital number, since it uses as much as digits as its factorization.

442004023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 442004023 is about 21023.8917187090. The cubic root of 442004023 is about 761.7434713767.

Adding to 442004023 its reverse (320400244), we get a palindrome (762404267).

The spelling of 442004023 in words is "four hundred forty-two million, four thousand, twenty-three".