195930247 has 2 divisors, whose sum is σ = 195930248. Its totient is φ = 195930246.

The previous prime is 195930233. The next prime is 195930257. The reversal of 195930247 is 742039591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195930247 - 2²³ = 187541639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195930227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97965123 + 97965124.

It is an arithmetic number, because the mean of its divisors is an integer number (97965124).

Almost surely, 2^195930247 is an apocalyptic number.

195930247 is a deficient number, since it is larger than the sum of its proper divisors (1).

195930247 is an equidigital number, since it uses as much as digits as its factorization.

195930247 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 40.

The square root of 195930247 is about 13997.5085997473. The cubic root of 195930247 is about 580.8096569777.

The spelling of 195930247 in words is "one hundred ninety-five million, nine hundred thirty thousand, two hundred forty-seven".