442423439 has 2 divisors, whose sum is σ = 442423440. Its totient is φ = 442423438.

The previous prime is 442423409. The next prime is 442423451. The reversal of 442423439 is 934324244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442423439 - 2¹² = 442419343 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 442423399 and 442423408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442423409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221211719 + 221211720.

It is an arithmetic number, because the mean of its divisors is an integer number (221211720).

Almost surely, 2^442423439 is an apocalyptic number.

442423439 is a deficient number, since it is larger than the sum of its proper divisors (1).

442423439 is an equidigital number, since it uses as much as digits as its factorization.

442423439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 35.

The square root of 442423439 is about 21033.8641005403. The cubic root of 442423439 is about 761.9843337392.

The spelling of 442423439 in words is "four hundred forty-two million, four hundred twenty-three thousand, four hundred thirty-nine".