197082217 has 2 divisors, whose sum is σ = 197082218. Its totient is φ = 197082216.

The previous prime is 197082199. The next prime is 197082227. The reversal of 197082217 is 712280791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195188841 + 1893376 = 13971^2 + 1376^2 .

It is an emirp because it is prime and its reverse (712280791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197082217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197082227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98541108 + 98541109.

It is an arithmetic number, because the mean of its divisors is an integer number (98541109).

Almost surely, 2^197082217 is an apocalyptic number.

It is an amenable number.

197082217 is a deficient number, since it is larger than the sum of its proper divisors (1).

197082217 is an equidigital number, since it uses as much as digits as its factorization.

197082217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 197082217 is about 14038.5974014500. The cubic root of 197082217 is about 581.9457216457.

The spelling of 197082217 in words is "one hundred ninety-seven million, eighty-two thousand, two hundred seventeen".