135691171 has 16 divisors (see below), whose sum is σ = 170323200. Its totient is φ = 105014880.

The previous prime is 135691163. The next prime is 135691189. The reversal of 135691171 is 171196531.

135691171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 135691171 - 2³ = 135691163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135691121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5560 + ... + 17386.

It is an arithmetic number, because the mean of its divisors is an integer number (10645200).

Almost surely, 2^135691171 is an apocalyptic number.

135691171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135691171 is a deficient number, since it is larger than the sum of its proper divisors (34632029).

135691171 is a wasteful number, since it uses less digits than its factorization.

135691171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11994.

The product of its digits is 5670, while the sum is 34.

The square root of 135691171 is about 11648.6553301229. The cubic root of 135691171 is about 513.8667651157.

The spelling of 135691171 in words is "one hundred thirty-five million, six hundred ninety-one thousand, one hundred seventy-one".