42718789 has 2 divisors, whose sum is σ = 42718790. Its totient is φ = 42718788.

The previous prime is 42718777. The next prime is 42718799. The reversal of 42718789 is 98781724.

42718789 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 can be written as a sum of positive squares in only one way, i.e., 38130625 + 4588164 = 6175^2 + 2142^2 .

It is a cyclic number.

It is not a de Polignac number, because 42718789 - 2¹⁹ = 42194501 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42718729) 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, 21359394 + 21359395.

It is an arithmetic number, because the mean of its divisors is an integer number (21359395).

Almost surely, 2^42718789 is an apocalyptic number.

It is an amenable number.

42718789 is a deficient number, since it is larger than the sum of its proper divisors (1).

42718789 is an equidigital number, since it uses as much as digits as its factorization.

42718789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 42718789 is about 6535.9612146952. The cubic root of 42718789 is about 349.5744187802.

The spelling of 42718789 in words is "forty-two million, seven hundred eighteen thousand, seven hundred eighty-nine".