42789443 has 2 divisors, whose sum is σ = 42789444. Its totient is φ = 42789442.

The previous prime is 42789431. The next prime is 42789469. The reversal of 42789443 is 34498724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42789443 - 2¹⁰ = 42788419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42789443.

It is not a weakly prime, because it can be changed into another prime (42789403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21394721 + 21394722.

It is an arithmetic number, because the mean of its divisors is an integer number (21394722).

Almost surely, 2^42789443 is an apocalyptic number.

42789443 is a deficient number, since it is larger than the sum of its proper divisors (1).

42789443 is an equidigital number, since it uses as much as digits as its factorization.

42789443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 41.

The square root of 42789443 is about 6541.3640014908. The cubic root of 42789443 is about 349.7670368087.

The spelling of 42789443 in words is "forty-two million, seven hundred eighty-nine thousand, four hundred forty-three".