197672171 has 2 divisors, whose sum is σ = 197672172. Its totient is φ = 197672170.

The previous prime is 197672131. The next prime is 197672173. The reversal of 197672171 is 171276791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197672171 - 2¹⁰ = 197671147 is a prime.

Together with 197672173, 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 (197672173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98836085 + 98836086.

It is an arithmetic number, because the mean of its divisors is an integer number (98836086).

Almost surely, 2^197672171 is an apocalyptic number.

197672171 is a deficient number, since it is larger than the sum of its proper divisors (1).

197672171 is an equidigital number, since it uses as much as digits as its factorization.

197672171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044, while the sum is 41.

The square root of 197672171 is about 14059.5935574255. The cubic root of 197672171 is about 582.5258166089.

It can be divided in two parts, 1976 and 72171, that added together give a palindrome (74147).

The spelling of 197672171 in words is "one hundred ninety-seven million, six hundred seventy-two thousand, one hundred seventy-one".