195764089 has 2 divisors, whose sum is σ = 195764090. Its totient is φ = 195764088.

The previous prime is 195764081. The next prime is 195764099. The reversal of 195764089 is 980467591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98406400 + 97357689 = 9920^2 + 9867^2 .

It is an emirp because it is prime and its reverse (980467591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195764089 - 2³ = 195764081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195764081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97882044 + 97882045.

It is an arithmetic number, because the mean of its divisors is an integer number (97882045).

Almost surely, 2^195764089 is an apocalyptic number.

It is an amenable number.

195764089 is a deficient number, since it is larger than the sum of its proper divisors (1).

195764089 is an equidigital number, since it uses as much as digits as its factorization.

195764089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 195764089 is about 13991.5720703572. The cubic root of 195764089 is about 580.6454259722.

The spelling of 195764089 in words is "one hundred ninety-five million, seven hundred sixty-four thousand, eighty-nine".