195609077 has 2 divisors, whose sum is σ = 195609078. Its totient is φ = 195609076.

The previous prime is 195609067. The next prime is 195609079. The reversal of 195609077 is 770906591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179935396 + 15673681 = 13414^2 + 3959^2 .

It is a cyclic number.

It is not a de Polignac number, because 195609077 - 2¹⁸ = 195346933 is a prime.

It is a super-2 number, since 2×195609077² = 76525822009583858, which contains 22 as substring.

Together with 195609079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195609079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97804538 + 97804539.

It is an arithmetic number, because the mean of its divisors is an integer number (97804539).

Almost surely, 2^195609077 is an apocalyptic number.

It is an amenable number.

195609077 is a deficient number, since it is larger than the sum of its proper divisors (1).

195609077 is an equidigital number, since it uses as much as digits as its factorization.

195609077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 195609077 is about 13986.0314957460. The cubic root of 195609077 is about 580.4921278938.

The spelling of 195609077 in words is "one hundred ninety-five million, six hundred nine thousand, seventy-seven".