195764081 has 2 divisors, whose sum is σ = 195764082. Its totient is φ = 195764080.

The previous prime is 195764057. The next prime is 195764089. The reversal of 195764081 is 180467591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163456225 + 32307856 = 12785^2 + 5684^2 .

It is a cyclic number.

It is not a de Polignac number, because 195764081 - 2¹⁴ = 195747697 is a prime.

It is a super-2 number, since 2×195764081² = 76647150819549122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195764089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97882040 + 97882041.

It is an arithmetic number, because the mean of its divisors is an integer number (97882041).

Almost surely, 2^195764081 is an apocalyptic number.

It is an amenable number.

195764081 is a deficient number, since it is larger than the sum of its proper divisors (1).

195764081 is an equidigital number, since it uses as much as digits as its factorization.

195764081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 195764081 is about 13991.5717844708. The cubic root of 195764081 is about 580.6454180628.

The spelling of 195764081 in words is "one hundred ninety-five million, seven hundred sixty-four thousand, eighty-one".