442321023 has 4 divisors (see below), whose sum is σ = 589761368. Its totient is φ = 294880680.

The previous prime is 442321013. The next prime is 442321049. The reversal of 442321023 is 320123244.

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

It is not a de Polignac number, because 442321023 - 2¹³ = 442312831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442321003) 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 in 3 ways as a sum of consecutive naturals, for example, 73720168 + ... + 73720173.

It is an arithmetic number, because the mean of its divisors is an integer number (147440342).

Almost surely, 2^442321023 is an apocalyptic number.

442321023 is a deficient number, since it is larger than the sum of its proper divisors (147440345).

442321023 is a wasteful number, since it uses less digits than its factorization.

442321023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147440344.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 442321023 is about 21031.4294093388. The cubic root of 442321023 is about 761.9255322961.

Adding to 442321023 its reverse (320123244), we get a palindrome (762444267).

The spelling of 442321023 in words is "four hundred forty-two million, three hundred twenty-one thousand, twenty-three".