135605143 has 2 divisors, whose sum is σ = 135605144. Its totient is φ = 135605142.

The previous prime is 135605137. The next prime is 135605149. The reversal of 135605143 is 341506531.

It is a balanced prime because it is at equal distance from previous prime (135605137) and next prime (135605149).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135605143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135605149) 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, 67802571 + 67802572.

It is an arithmetic number, because the mean of its divisors is an integer number (67802572).

Almost surely, 2^135605143 is an apocalyptic number.

135605143 is a deficient number, since it is larger than the sum of its proper divisors (1).

135605143 is an equidigital number, since it uses as much as digits as its factorization.

135605143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 135605143 is about 11644.9621296078. The cubic root of 135605143 is about 513.7581452366.

The spelling of 135605143 in words is "one hundred thirty-five million, six hundred five thousand, one hundred forty-three".