135205687 has 2 divisors, whose sum is σ = 135205688. Its totient is φ = 135205686.

The previous prime is 135205673. The next prime is 135205739. The reversal of 135205687 is 786502531.

It is a weak prime.

It is an emirp because it is prime and its reverse (786502531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135205687 - 2⁷ = 135205559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135203687) 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, 67602843 + 67602844.

It is an arithmetic number, because the mean of its divisors is an integer number (67602844).

Almost surely, 2^135205687 is an apocalyptic number.

135205687 is a deficient number, since it is larger than the sum of its proper divisors (1).

135205687 is an equidigital number, since it uses as much as digits as its factorization.

135205687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 135205687 is about 11627.7980288617. The cubic root of 135205687 is about 513.2531850000.

The spelling of 135205687 in words is "one hundred thirty-five million, two hundred five thousand, six hundred eighty-seven".