195731297 has 2 divisors, whose sum is σ = 195731298. Its totient is φ = 195731296.

The previous prime is 195731287. The next prime is 195731299. The reversal of 195731297 is 792137591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125238481 + 70492816 = 11191^2 + 8396^2 .

It is a cyclic number.

It is not a de Polignac number, because 195731297 - 2⁴ = 195731281 is a prime.

Together with 195731299, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195731299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97865648 + 97865649.

It is an arithmetic number, because the mean of its divisors is an integer number (97865649).

Almost surely, 2^195731297 is an apocalyptic number.

It is an amenable number.

195731297 is a deficient number, since it is larger than the sum of its proper divisors (1).

195731297 is an equidigital number, since it uses as much as digits as its factorization.

195731297 is an evil number, because the sum of its binary digits is even.

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

The square root of 195731297 is about 13990.4001729758. The cubic root of 195731297 is about 580.6130032943.

The spelling of 195731297 in words is "one hundred ninety-five million, seven hundred thirty-one thousand, two hundred ninety-seven".