42043340089 has 2 divisors, whose sum is σ = 42043340090. Its totient is φ = 42043340088.

The previous prime is 42043340083. The next prime is 42043340117. The reversal of 42043340089 is 98004334024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30867678864 + 11175661225 = 175692^2 + 105715^2 .

It is a cyclic number.

It is not a de Polignac number, because 42043340089 - 2⁵ = 42043340057 is a prime.

It is not a weakly prime, because it can be changed into another prime (42043340083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021670044 + 21021670045.

It is an arithmetic number, because the mean of its divisors is an integer number (21021670045).

Almost surely, 2^42043340089 is an apocalyptic number.

It is an amenable number.

42043340089 is a deficient number, since it is larger than the sum of its proper divisors (1).

42043340089 is an equidigital number, since it uses as much as digits as its factorization.

42043340089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 42043340089 in words is "forty-two billion, forty-three million, three hundred forty thousand, eighty-nine".