442399999 has 4 divisors (see below), whose sum is σ = 449652520. Its totient is φ = 435147480.

The previous prime is 442399987. The next prime is 442400011. The reversal of 442399999 is 999993244.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (442399987) and next prime (442400011).

It is a cyclic number.

It is not a de Polignac number, because 442399999 - 2¹¹ = 442397951 is a prime.

It is a Duffinian number.

442399999 is a modest number, since divided by 99999 gives 4423 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442399949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3626169 + ... + 3626290.

It is an arithmetic number, because the mean of its divisors is an integer number (112413130).

Almost surely, 2^442399999 is an apocalyptic number.

442399999 is a deficient number, since it is larger than the sum of its proper divisors (7252521).

442399999 is an equidigital number, since it uses as much as digits as its factorization.

442399999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7252520.

The product of its digits is 5668704, while the sum is 58.

The square root of 442399999 is about 21033.3068964440. The cubic root of 442399999 is about 761.9708766250.

The spelling of 442399999 in words is "four hundred forty-two million, three hundred ninety-nine thousand, nine hundred ninety-nine".