135581935 has 4 divisors (see below), whose sum is σ = 162698328. Its totient is φ = 108465544.

The previous prime is 135581909. The next prime is 135581959. The reversal of 135581935 is 539185531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135581935 - 2⁹ = 135581423 is a prime.

It is a super-2 number, since 2×135581935² = 36764922196688450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13558189 + ... + 13558198.

It is an arithmetic number, because the mean of its divisors is an integer number (40674582).

Almost surely, 2^135581935 is an apocalyptic number.

135581935 is a deficient number, since it is larger than the sum of its proper divisors (27116393).

135581935 is an equidigital number, since it uses as much as digits as its factorization.

135581935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27116392.

The product of its digits is 81000, while the sum is 40.

The square root of 135581935 is about 11643.9656045524. The cubic root of 135581935 is about 513.7288346981.

The spelling of 135581935 in words is "one hundred thirty-five million, five hundred eighty-one thousand, nine hundred thirty-five".