442123999 has 2 divisors, whose sum is σ = 442124000. Its totient is φ = 442123998.

The previous prime is 442123991. The next prime is 442124003. The reversal of 442123999 is 999321244.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442123999 - 2³ = 442123991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442123991) 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, 221061999 + 221062000.

It is an arithmetic number, because the mean of its divisors is an integer number (221062000).

Almost surely, 2^442123999 is an apocalyptic number.

442123999 is a deficient number, since it is larger than the sum of its proper divisors (1).

442123999 is an equidigital number, since it uses as much as digits as its factorization.

442123999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 442123999 is about 21026.7448503091. The cubic root of 442123999 is about 761.8123867880.

The spelling of 442123999 in words is "four hundred forty-two million, one hundred twenty-three thousand, nine hundred ninety-nine".