8442119989 has 2 divisors, whose sum is σ = 8442119990. Its totient is φ = 8442119988.

The previous prime is 8442119977. The next prime is 8442119993. The reversal of 8442119989 is 9899112448.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4869667089 + 3572452900 = 69783^2 + 59770^2 .

It is a cyclic number.

It is not a de Polignac number, because 8442119989 - 2¹⁵ = 8442087221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8442119969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4221059994 + 4221059995.

It is an arithmetic number, because the mean of its divisors is an integer number (4221059995).

Almost surely, 2^8442119989 is an apocalyptic number.

It is an amenable number.

8442119989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8442119989 is an equidigital number, since it uses as much as digits as its factorization.

8442119989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 55.

The square root of 8442119989 is about 91881.0099476491. The cubic root of 8442119989 is about 2036.1847173749.

The spelling of 8442119989 in words is "eight billion, four hundred forty-two million, one hundred nineteen thousand, nine hundred eighty-nine".