195497273 has 2 divisors, whose sum is σ = 195497274. Its totient is φ = 195497272.

The previous prime is 195497243. The next prime is 195497321. The reversal of 195497273 is 372794591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153091129 + 42406144 = 12373^2 + 6512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195497273 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (195497243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97748636 + 97748637.

It is an arithmetic number, because the mean of its divisors is an integer number (97748637).

Almost surely, 2^195497273 is an apocalyptic number.

It is an amenable number.

195497273 is a deficient number, since it is larger than the sum of its proper divisors (1).

195497273 is an equidigital number, since it uses as much as digits as its factorization.

195497273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 47.

The square root of 195497273 is about 13982.0339364486. The cubic root of 195497273 is about 580.3815097978.

The spelling of 195497273 in words is "one hundred ninety-five million, four hundred ninety-seven thousand, two hundred seventy-three".