442701643 has 4 divisors (see below), whose sum is σ = 445417768. Its totient is φ = 439985520.

The previous prime is 442701587. The next prime is 442701659. The reversal of 442701643 is 346107244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442701643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442701683) 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, 1357818 + ... + 1358143.

It is an arithmetic number, because the mean of its divisors is an integer number (111354442).

Almost surely, 2^442701643 is an apocalyptic number.

442701643 is a deficient number, since it is larger than the sum of its proper divisors (2716125).

442701643 is a wasteful number, since it uses less digits than its factorization.

442701643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716124.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 442701643 is about 21040.4763016430. The cubic root of 442701643 is about 762.1440168637.

Adding to 442701643 its reverse (346107244), we get a palindrome (788808887).

It can be divided in two parts, 442701 and 643, that added together give a palindrome (443344).

The spelling of 442701643 in words is "four hundred forty-two million, seven hundred one thousand, six hundred forty-three".