136866187 has 2 divisors, whose sum is σ = 136866188. Its totient is φ = 136866186.

The previous prime is 136866181. The next prime is 136866217. The reversal of 136866187 is 781668631.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136866187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136866181) 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, 68433093 + 68433094.

It is an arithmetic number, because the mean of its divisors is an integer number (68433094).

Almost surely, 2^136866187 is an apocalyptic number.

136866187 is a deficient number, since it is larger than the sum of its proper divisors (1).

136866187 is an equidigital number, since it uses as much as digits as its factorization.

136866187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 136866187 is about 11698.9823061666. The cubic root of 136866187 is about 515.3457784074.

The spelling of 136866187 in words is "one hundred thirty-six million, eight hundred sixty-six thousand, one hundred eighty-seven".