135605947 has 2 divisors, whose sum is σ = 135605948. Its totient is φ = 135605946.

The previous prime is 135605929. The next prime is 135605969. The reversal of 135605947 is 749506531.

135605947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (749506531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135605947 - 2¹¹ = 135603899 is a prime.

It is not a weakly prime, because it can be changed into another prime (135605917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67802973 + 67802974.

It is an arithmetic number, because the mean of its divisors is an integer number (67802974).

Almost surely, 2^135605947 is an apocalyptic number.

135605947 is a deficient number, since it is larger than the sum of its proper divisors (1).

135605947 is an equidigital number, since it uses as much as digits as its factorization.

135605947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 135605947 is about 11644.9966509227. The cubic root of 135605947 is about 513.7591605883.

The spelling of 135605947 in words is "one hundred thirty-five million, six hundred five thousand, nine hundred forty-seven".