197950171 has 2 divisors, whose sum is σ = 197950172. Its totient is φ = 197950170.

The previous prime is 197950127. The next prime is 197950183. The reversal of 197950171 is 171059791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197950171 - 2²³ = 189561563 is a prime.

It is not a weakly prime, because it can be changed into another prime (197950271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98975085 + 98975086.

It is an arithmetic number, because the mean of its divisors is an integer number (98975086).

Almost surely, 2^197950171 is an apocalyptic number.

197950171 is a deficient number, since it is larger than the sum of its proper divisors (1).

197950171 is an equidigital number, since it uses as much as digits as its factorization.

197950171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19845, while the sum is 40.

The square root of 197950171 is about 14069.4765716426. The cubic root of 197950171 is about 582.7987707610.

The spelling of 197950171 in words is "one hundred ninety-seven million, nine hundred fifty thousand, one hundred seventy-one".