135218887 has 2 divisors, whose sum is σ = 135218888. Its totient is φ = 135218886.

The previous prime is 135218827. The next prime is 135218893. The reversal of 135218887 is 788812531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135218887 - 2²⁷ = 1001159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135218827) 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, 67609443 + 67609444.

It is an arithmetic number, because the mean of its divisors is an integer number (67609444).

Almost surely, 2^135218887 is an apocalyptic number.

135218887 is a deficient number, since it is larger than the sum of its proper divisors (1).

135218887 is an equidigital number, since it uses as much as digits as its factorization.

135218887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 43.

The square root of 135218887 is about 11628.3656203269. The cubic root of 135218887 is about 513.2698872599.

The spelling of 135218887 in words is "one hundred thirty-five million, two hundred eighteen thousand, eight hundred eighty-seven".