135919161 has 16 divisors (see below), whose sum is σ = 230128000. Its totient is φ = 77667984.

The previous prime is 135919079. The next prime is 135919183. The reversal of 135919161 is 161919531.

It is a happy number.

135919161 is a `hidden beast` number, since 1 + 3 + 591 + 9 + 1 + 61 = 666.

135919161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135919161 - 2²⁷ = 1701433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135919361) 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, 359386 + ... + 359763.

It is an arithmetic number, because the mean of its divisors is an integer number (14383000).

Almost surely, 2^135919161 is an apocalyptic number.

It is an amenable number.

135919161 is a deficient number, since it is larger than the sum of its proper divisors (94208839).

135919161 is an equidigital number, since it uses as much as digits as its factorization.

135919161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719165 (or 719159 counting only the distinct ones).

The product of its digits is 7290, while the sum is 36.

The square root of 135919161 is about 11658.4373309634. The cubic root of 135919161 is about 514.1544058619.

The spelling of 135919161 in words is "one hundred thirty-five million, nine hundred nineteen thousand, one hundred sixty-one".