195930817 has 2 divisors, whose sum is σ = 195930818. Its totient is φ = 195930816.

The previous prime is 195930773. The next prime is 195930821. The reversal of 195930817 is 718039591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194212096 + 1718721 = 13936^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 195930817 - 2⁷ = 195930689 is a prime.

It is not a weakly prime, because it can be changed into another prime (195930857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97965408 + 97965409.

It is an arithmetic number, because the mean of its divisors is an integer number (97965409).

Almost surely, 2^195930817 is an apocalyptic number.

It is an amenable number.

195930817 is a deficient number, since it is larger than the sum of its proper divisors (1).

195930817 is an equidigital number, since it uses as much as digits as its factorization.

195930817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 195930817 is about 13997.5289604987. The cubic root of 195930817 is about 580.8102202074.

The spelling of 195930817 in words is "one hundred ninety-five million, nine hundred thirty thousand, eight hundred seventeen".