136581187 has 2 divisors, whose sum is σ = 136581188. Its totient is φ = 136581186.

The previous prime is 136581173. The next prime is 136581197. The reversal of 136581187 is 781185631.

It is a strong prime.

It is an emirp because it is prime and its reverse (781185631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136581187 - 2⁷ = 136581059 is a prime.

It is not a weakly prime, because it can be changed into another prime (136581157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68290593 + 68290594.

It is an arithmetic number, because the mean of its divisors is an integer number (68290594).

Almost surely, 2^136581187 is an apocalyptic number.

136581187 is a deficient number, since it is larger than the sum of its proper divisors (1).

136581187 is an equidigital number, since it uses as much as digits as its factorization.

136581187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 136581187 is about 11686.7954119168. The cubic root of 136581187 is about 514.9878238866.

The spelling of 136581187 in words is "one hundred thirty-six million, five hundred eighty-one thousand, one hundred eighty-seven".