136242191 has 2 divisors, whose sum is σ = 136242192. Its totient is φ = 136242190.

The previous prime is 136242187. The next prime is 136242229. The reversal of 136242191 is 191242631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136242191 - 2² = 136242187 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 (136242391) 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, 68121095 + 68121096.

It is an arithmetic number, because the mean of its divisors is an integer number (68121096).

Almost surely, 2^136242191 is an apocalyptic number.

136242191 is a deficient number, since it is larger than the sum of its proper divisors (1).

136242191 is an equidigital number, since it uses as much as digits as its factorization.

136242191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 136242191 is about 11672.2830243273. The cubic root of 136242191 is about 514.5614024270.

The spelling of 136242191 in words is "one hundred thirty-six million, two hundred forty-two thousand, one hundred ninety-one".