442442939 has 2 divisors, whose sum is σ = 442442940. Its totient is φ = 442442938.

The previous prime is 442442863. The next prime is 442442951. The reversal of 442442939 is 939244244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442442939 - 2²⁰ = 441394363 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 442442896 and 442442905.

It is not a weakly prime, because it can be changed into another prime (442448939) 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, 221221469 + 221221470.

It is an arithmetic number, because the mean of its divisors is an integer number (221221470).

Almost surely, 2^442442939 is an apocalyptic number.

442442939 is a deficient number, since it is larger than the sum of its proper divisors (1).

442442939 is an equidigital number, since it uses as much as digits as its factorization.

442442939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 41.

The square root of 442442939 is about 21034.3276336564. The cubic root of 442442939 is about 761.9955285019.

The spelling of 442442939 in words is "four hundred forty-two million, four hundred forty-two thousand, nine hundred thirty-nine".