195168977 has 2 divisors, whose sum is σ = 195168978. Its totient is φ = 195168976.

The previous prime is 195168913. The next prime is 195168997. The reversal of 195168977 is 779861591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193738561 + 1430416 = 13919^2 + 1196^2 .

It is a cyclic number.

It is not a de Polignac number, because 195168977 - 2⁶ = 195168913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195168907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97584488 + 97584489.

It is an arithmetic number, because the mean of its divisors is an integer number (97584489).

Almost surely, 2^195168977 is an apocalyptic number.

It is an amenable number.

195168977 is a deficient number, since it is larger than the sum of its proper divisors (1).

195168977 is an equidigital number, since it uses as much as digits as its factorization.

195168977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 53.

The square root of 195168977 is about 13970.2890807599. The cubic root of 195168977 is about 580.0564520954.

The spelling of 195168977 in words is "one hundred ninety-five million, one hundred sixty-eight thousand, nine hundred seventy-seven".