136205197 has 2 divisors, whose sum is σ = 136205198. Its totient is φ = 136205196.

The previous prime is 136205189. The next prime is 136205261. The reversal of 136205197 is 791502631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134884996 + 1320201 = 11614^2 + 1149^2 .

It is a cyclic number.

It is not a de Polignac number, because 136205197 - 2³ = 136205189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136205137) 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, 68102598 + 68102599.

It is an arithmetic number, because the mean of its divisors is an integer number (68102599).

Almost surely, 2^136205197 is an apocalyptic number.

It is an amenable number.

136205197 is a deficient number, since it is larger than the sum of its proper divisors (1).

136205197 is an equidigital number, since it uses as much as digits as its factorization.

136205197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 136205197 is about 11670.6982224715. The cubic root of 136205197 is about 514.5148250597.

The spelling of 136205197 in words is "one hundred thirty-six million, two hundred five thousand, one hundred ninety-seven".