442343243 has 4 divisors (see below), whose sum is σ = 446477400. Its totient is φ = 438209088.

The previous prime is 442343233. The next prime is 442343249. The reversal of 442343243 is 342343244.

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

It is a cyclic number.

It is not a de Polignac number, because 442343243 - 2⁴ = 442343227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442343249) 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, 2066918 + ... + 2067131.

It is an arithmetic number, because the mean of its divisors is an integer number (111619350).

Almost surely, 2^442343243 is an apocalyptic number.

442343243 is a deficient number, since it is larger than the sum of its proper divisors (4134157).

442343243 is a wasteful number, since it uses less digits than its factorization.

442343243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134156.

The product of its digits is 27648, while the sum is 29.

The square root of 442343243 is about 21031.9576597139. The cubic root of 442343243 is about 761.9382905274.

Adding to 442343243 its reverse (342343244), we get a palindrome (784686487).

Subtracting from 442343243 its reverse (342343244), we obtain a palindrome (99999999).

The spelling of 442343243 in words is "four hundred forty-two million, three hundred forty-three thousand, two hundred forty-three".