195715769 has 2 divisors, whose sum is σ = 195715770. Its totient is φ = 195715768.

The previous prime is 195715691. The next prime is 195715801. The reversal of 195715769 is 967517591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192876544 + 2839225 = 13888^2 + 1685^2 .

It is an emirp because it is prime and its reverse (967517591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195715769 - 2²⁴ = 178938553 is a prime.

It is a super-2 number, since 2×195715769² = 76609324470522722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (195718769) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97857884 + 97857885.

It is an arithmetic number, because the mean of its divisors is an integer number (97857885).

Almost surely, 2^195715769 is an apocalyptic number.

It is an amenable number.

195715769 is a deficient number, since it is larger than the sum of its proper divisors (1).

195715769 is an equidigital number, since it uses as much as digits as its factorization.

195715769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 50.

The square root of 195715769 is about 13989.8452100086. The cubic root of 195715769 is about 580.5976489159.

The spelling of 195715769 in words is "one hundred ninety-five million, seven hundred fifteen thousand, seven hundred sixty-nine".