197185217 has 2 divisors, whose sum is σ = 197185218. Its totient is φ = 197185216.

The previous prime is 197185213. The next prime is 197185223. The reversal of 197185217 is 712581791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114083761 + 83101456 = 10681^2 + 9116^2 .

It is a cyclic number.

It is not a de Polignac number, because 197185217 - 2² = 197185213 is a prime.

It is not a weakly prime, because it can be changed into another prime (197185213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98592608 + 98592609.

It is an arithmetic number, because the mean of its divisors is an integer number (98592609).

Almost surely, 2^197185217 is an apocalyptic number.

It is an amenable number.

197185217 is a deficient number, since it is larger than the sum of its proper divisors (1).

197185217 is an equidigital number, since it uses as much as digits as its factorization.

197185217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 41.

The square root of 197185217 is about 14042.2653799164. The cubic root of 197185217 is about 582.0470836918.

The spelling of 197185217 in words is "one hundred ninety-seven million, one hundred eighty-five thousand, two hundred seventeen".