135217705 has 12 divisors (see below), whose sum is σ = 188753220. Its totient is φ = 92720544.

The previous prime is 135217703. The next prime is 135217717. The reversal of 135217705 is 507712531.

It can be written as a sum of positive squares in 2 ways, for example, as 78907689 + 56310016 = 8883^2 + 7504^2 .

It is not a de Polignac number, because 135217705 - 2¹ = 135217703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135217703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275710 + ... + 276199.

It is an arithmetic number, because the mean of its divisors is an integer number (15729435).

Almost surely, 2^135217705 is an apocalyptic number.

It is an amenable number.

135217705 is a deficient number, since it is larger than the sum of its proper divisors (53535515).

135217705 is an equidigital number, since it uses as much as digits as its factorization.

135217705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551928 (or 551921 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 135217705 is about 11628.3147962205. The cubic root of 135217705 is about 513.2683916928.

The spelling of 135217705 in words is "one hundred thirty-five million, two hundred seventeen thousand, seven hundred five".