135068509 has 2 divisors, whose sum is σ = 135068510. Its totient is φ = 135068508.

The previous prime is 135068503. The next prime is 135068533. The reversal of 135068509 is 905860531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127351225 + 7717284 = 11285^2 + 2778^2 .

It is a cyclic number.

It is not a de Polignac number, because 135068509 - 2⁵ = 135068477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135068503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67534254 + 67534255.

It is an arithmetic number, because the mean of its divisors is an integer number (67534255).

Almost surely, 2^135068509 is an apocalyptic number.

It is an amenable number.

135068509 is a deficient number, since it is larger than the sum of its proper divisors (1).

135068509 is an equidigital number, since it uses as much as digits as its factorization.

135068509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 135068509 is about 11621.8978226450. The cubic root of 135068509 is about 513.0795461742.

The spelling of 135068509 in words is "one hundred thirty-five million, sixty-eight thousand, five hundred nine".