42538843 has 2 divisors, whose sum is σ = 42538844. Its totient is φ = 42538842.

The previous prime is 42538831. The next prime is 42538849. The reversal of 42538843 is 34883524.

42538843 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 a de Polignac number, because none of the positive numbers 2^k-42538843 is a prime.

It is not a weakly prime, because it can be changed into another prime (42538849) 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, 21269421 + 21269422.

It is an arithmetic number, because the mean of its divisors is an integer number (21269422).

Almost surely, 2^42538843 is an apocalyptic number.

42538843 is a deficient number, since it is larger than the sum of its proper divisors (1).

42538843 is an equidigital number, since it uses as much as digits as its factorization.

42538843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 37.

The square root of 42538843 is about 6522.1808469254. The cubic root of 42538843 is about 349.0828860366.

The spelling of 42538843 in words is "forty-two million, five hundred thirty-eight thousand, eight hundred forty-three".