197530864171 has 2 divisors, whose sum is σ = 197530864172. Its totient is φ = 197530864170.

The previous prime is 197530864169. The next prime is 197530864211. The reversal of 197530864171 is 171468035791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197530864171 - 2¹ = 197530864169 is a prime.

Together with 197530864169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (197530814171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98765432085 + 98765432086.

It is an arithmetic number, because the mean of its divisors is an integer number (98765432086).

Almost surely, 2^197530864171 is an apocalyptic number.

197530864171 is a deficient number, since it is larger than the sum of its proper divisors (1).

197530864171 is an equidigital number, since it uses as much as digits as its factorization.

197530864171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 197530864171 in words is "one hundred ninety-seven billion, five hundred thirty million, eight hundred sixty-four thousand, one hundred seventy-one".