42950806009 has 2 divisors, whose sum is σ = 42950806010. Its totient is φ = 42950806008.

The previous prime is 42950805977. The next prime is 42950806037. The reversal of 42950806009 is 90060805924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24995610000 + 17955196009 = 158100^2 + 133997^2 .

It is a cyclic number.

It is not a de Polignac number, because 42950806009 - 2⁵ = 42950805977 is a prime.

It is not a weakly prime, because it can be changed into another prime (42950806049) 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, 21475403004 + 21475403005.

It is an arithmetic number, because the mean of its divisors is an integer number (21475403005).

Almost surely, 2^42950806009 is an apocalyptic number.

It is an amenable number.

42950806009 is a deficient number, since it is larger than the sum of its proper divisors (1).

42950806009 is an equidigital number, since it uses as much as digits as its factorization.

42950806009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 42950806009 in words is "forty-two billion, nine hundred fifty million, eight hundred six thousand, nine".