1968444089 has 2 divisors, whose sum is σ = 1968444090. Its totient is φ = 1968444088.

The previous prime is 1968444077. The next prime is 1968444113. The reversal of 1968444089 is 9804448691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1433909689 + 534534400 = 37867^2 + 23120^2 .

It is an emirp because it is prime and its reverse (9804448691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1968444089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1968444089.

It is not a weakly prime, because it can be changed into another prime (1968444589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984222044 + 984222045.

It is an arithmetic number, because the mean of its divisors is an integer number (984222045).

Almost surely, 2^1968444089 is an apocalyptic number.

It is an amenable number.

1968444089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968444089 is an equidigital number, since it uses as much as digits as its factorization.

1968444089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The square root of 1968444089 is about 44367.1510128834. The cubic root of 1968444089 is about 1253.2595651200.

The spelling of 1968444089 in words is "one billion, nine hundred sixty-eight million, four hundred forty-four thousand, eighty-nine".