135686187 has 24 divisors (see below), whose sum is σ = 241221344. Its totient is φ = 71570304.

The previous prime is 135686167. The next prime is 135686191. The reversal of 135686187 is 781686531.

135686187 is a `hidden beast` number, since 1 + 3 + 568 + 6 + 1 + 87 = 666.

It is not a de Polignac number, because 135686187 - 2⁸ = 135685931 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (135686167) 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 in 23 ways as a sum of consecutive naturals, for example, 82018 + ... + 83655.

Almost surely, 2^135686187 is an apocalyptic number.

135686187 is a deficient number, since it is larger than the sum of its proper divisors (105535157).

135686187 is a wasteful number, since it uses less digits than its factorization.

135686187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165699 (or 165696 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 135686187 is about 11648.4413978867. The cubic root of 135686187 is about 513.8604735167.

The spelling of 135686187 in words is "one hundred thirty-five million, six hundred eighty-six thousand, one hundred eighty-seven".