42443092009 has 2 divisors, whose sum is σ = 42443092010. Its totient is φ = 42443092008.

The previous prime is 42443091949. The next prime is 42443092051. The reversal of 42443092009 is 90029034424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22940131600 + 19502960409 = 151460^2 + 139653^2 .

It is a cyclic number.

It is not a de Polignac number, because 42443092009 - 2¹¹ = 42443089961 is a prime.

It is not a weakly prime, because it can be changed into another prime (42443092099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221546004 + 21221546005.

It is an arithmetic number, because the mean of its divisors is an integer number (21221546005).

Almost surely, 2^42443092009 is an apocalyptic number.

It is an amenable number.

42443092009 is a deficient number, since it is larger than the sum of its proper divisors (1).

42443092009 is an equidigital number, since it uses as much as digits as its factorization.

42443092009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 42443092009 in words is "forty-two billion, four hundred forty-three million, ninety-two thousand, nine".