442353239 has 2 divisors, whose sum is σ = 442353240. Its totient is φ = 442353238.

The previous prime is 442353187. The next prime is 442353251. The reversal of 442353239 is 932353244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442353239 - 2¹² = 442349143 is a prime.

It is a super-2 number, since 2×442353239² = 391352776107582242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 442353199 and 442353208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442353259) 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, 221176619 + 221176620.

It is an arithmetic number, because the mean of its divisors is an integer number (221176620).

Almost surely, 2^442353239 is an apocalyptic number.

442353239 is a deficient number, since it is larger than the sum of its proper divisors (1).

442353239 is an equidigital number, since it uses as much as digits as its factorization.

442353239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 35.

The square root of 442353239 is about 21032.1952967350. The cubic root of 442353239 is about 761.9440298697.

It can be divided in two parts, 44235 and 3239, that added together give a palindrome (47474).

The spelling of 442353239 in words is "four hundred forty-two million, three hundred fifty-three thousand, two hundred thirty-nine".