195171497 has 2 divisors, whose sum is σ = 195171498. Its totient is φ = 195171496.

The previous prime is 195171481. The next prime is 195171499. The reversal of 195171497 is 794171591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173817856 + 21353641 = 13184^2 + 4621^2 .

It is an emirp because it is prime and its reverse (794171591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195171497 - 2⁴ = 195171481 is a prime.

Together with 195171499, 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 (195171499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97585748 + 97585749.

It is an arithmetic number, because the mean of its divisors is an integer number (97585749).

Almost surely, 2^195171497 is an apocalyptic number.

It is an amenable number.

195171497 is a deficient number, since it is larger than the sum of its proper divisors (1).

195171497 is an equidigital number, since it uses as much as digits as its factorization.

195171497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 44.

The square root of 195171497 is about 13970.3792718738. The cubic root of 195171497 is about 580.0589486260.

The spelling of 195171497 in words is "one hundred ninety-five million, one hundred seventy-one thousand, four hundred ninety-seven".