135706217 has 8 divisors (see below), whose sum is σ = 136805760. Its totient is φ = 134610640.

The previous prime is 135706183. The next prime is 135706229. The reversal of 135706217 is 712607531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135706217 - 2¹² = 135702121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135706297) 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 in 7 ways as a sum of consecutive naturals, for example, 123842 + ... + 124932.

It is an arithmetic number, because the mean of its divisors is an integer number (17100720).

Almost surely, 2^135706217 is an apocalyptic number.

It is an amenable number.

135706217 is a deficient number, since it is larger than the sum of its proper divisors (1099543).

135706217 is a wasteful number, since it uses less digits than its factorization.

135706217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 135706217 is about 11649.3011378366. The cubic root of 135706217 is about 513.8857576400.

The spelling of 135706217 in words is "one hundred thirty-five million, seven hundred six thousand, two hundred seventeen".