136409197 has 2 divisors, whose sum is σ = 136409198. Its totient is φ = 136409196.

The previous prime is 136409177. The next prime is 136409209. The reversal of 136409197 is 791904631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109223401 + 27185796 = 10451^2 + 5214^2 .

It is a cyclic number.

It is not a de Polignac number, because 136409197 - 2¹¹ = 136407149 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 (136409137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68204598 + 68204599.

It is an arithmetic number, because the mean of its divisors is an integer number (68204599).

Almost surely, 2^136409197 is an apocalyptic number.

It is an amenable number.

136409197 is a deficient number, since it is larger than the sum of its proper divisors (1).

136409197 is an equidigital number, since it uses as much as digits as its factorization.

136409197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 136409197 is about 11679.4347894065. The cubic root of 136409197 is about 514.7715667718.

The spelling of 136409197 in words is "one hundred thirty-six million, four hundred nine thousand, one hundred ninety-seven".