195764099 has 2 divisors, whose sum is σ = 195764100. Its totient is φ = 195764098.

The previous prime is 195764089. The next prime is 195764131. The reversal of 195764099 is 990467591.

It is a weak prime.

It is an emirp because it is prime and its reverse (990467591) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195764099 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (195764029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97882049 + 97882050.

It is an arithmetic number, because the mean of its divisors is an integer number (97882050).

Almost surely, 2^195764099 is an apocalyptic number.

195764099 is a deficient number, since it is larger than the sum of its proper divisors (1).

195764099 is an equidigital number, since it uses as much as digits as its factorization.

195764099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 195764099 is about 13991.5724277152. The cubic root of 195764099 is about 580.6454358591.

The spelling of 195764099 in words is "one hundred ninety-five million, seven hundred sixty-four thousand, ninety-nine".