135205559 has 2 divisors, whose sum is σ = 135205560. Its totient is φ = 135205558.

The previous prime is 135205541. The next prime is 135205619. The reversal of 135205559 is 955502531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135205559 - 2¹⁶ = 135140023 is a prime.

It is a Chen prime.

It is equal to p_7656461 and since 135205559 and 7656461 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135205519) 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, 67602779 + 67602780.

It is an arithmetic number, because the mean of its divisors is an integer number (67602780).

Almost surely, 2^135205559 is an apocalyptic number.

135205559 is a deficient number, since it is larger than the sum of its proper divisors (1).

135205559 is an equidigital number, since it uses as much as digits as its factorization.

135205559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33750, while the sum is 35.

The square root of 135205559 is about 11627.7925248088. The cubic root of 135205559 is about 513.2530230334.

The spelling of 135205559 in words is "one hundred thirty-five million, two hundred five thousand, five hundred fifty-nine".