135605513 has 2 divisors, whose sum is σ = 135605514. Its totient is φ = 135605512.

The previous prime is 135605507. The next prime is 135605581. The reversal of 135605513 is 315506531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121264144 + 14341369 = 11012^2 + 3787^2 .

It is a cyclic number.

It is not a de Polignac number, because 135605513 - 2²⁰ = 134556937 is a prime.

It is not a weakly prime, because it can be changed into another prime (135605213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67802756 + 67802757.

It is an arithmetic number, because the mean of its divisors is an integer number (67802757).

Almost surely, 2^135605513 is an apocalyptic number.

It is an amenable number.

135605513 is a deficient number, since it is larger than the sum of its proper divisors (1).

135605513 is an equidigital number, since it uses as much as digits as its factorization.

135605513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 135605513 is about 11644.9780162953. The cubic root of 135605513 is about 513.7586125010.

The spelling of 135605513 in words is "one hundred thirty-five million, six hundred five thousand, five hundred thirteen".