42844643 has 2 divisors, whose sum is σ = 42844644. Its totient is φ = 42844642.

The previous prime is 42844603. The next prime is 42844657. The reversal of 42844643 is 34644824.

42844643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42844643 - 2⁶ = 42844579 is a prime.

It is not a weakly prime, because it can be changed into another prime (42844603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21422321 + 21422322.

It is an arithmetic number, because the mean of its divisors is an integer number (21422322).

Almost surely, 2^42844643 is an apocalyptic number.

42844643 is a deficient number, since it is larger than the sum of its proper divisors (1).

42844643 is an equidigital number, since it uses as much as digits as its factorization.

42844643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 35.

The square root of 42844643 is about 6545.5819450985. The cubic root of 42844643 is about 349.9173764152.

The spelling of 42844643 in words is "forty-two million, eight hundred forty-four thousand, six hundred forty-three".