196206191 has 2 divisors, whose sum is σ = 196206192. Its totient is φ = 196206190.

The previous prime is 196206187. The next prime is 196206203. The reversal of 196206191 is 191602691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196206191 - 2² = 196206187 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196206091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98103095 + 98103096.

It is an arithmetic number, because the mean of its divisors is an integer number (98103096).

Almost surely, 2^196206191 is an apocalyptic number.

196206191 is a deficient number, since it is larger than the sum of its proper divisors (1).

196206191 is an equidigital number, since it uses as much as digits as its factorization.

196206191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 196206191 is about 14007.3620285905. The cubic root of 196206191 is about 581.0821957350.

The spelling of 196206191 in words is "one hundred ninety-six million, two hundred six thousand, one hundred ninety-one".