135996505 has 4 divisors (see below), whose sum is σ = 163195812. Its totient is φ = 108797200.

The previous prime is 135996479. The next prime is 135996577. The reversal of 135996505 is 505699531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505699531 = 5981 ⋅84551.

It can be written as a sum of positive squares in 2 ways, for example, as 93954249 + 42042256 = 9693^2 + 6484^2 .

It is not a de Polignac number, because 135996505 - 2²³ = 127607897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13599646 + ... + 13599655.

It is an arithmetic number, because the mean of its divisors is an integer number (40798953).

Almost surely, 2^135996505 is an apocalyptic number.

It is an amenable number.

135996505 is a deficient number, since it is larger than the sum of its proper divisors (27199307).

135996505 is an equidigital number, since it uses as much as digits as its factorization.

135996505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27199306.

The product of its (nonzero) digits is 182250, while the sum is 43.

The square root of 135996505 is about 11661.7539418391. The cubic root of 135996505 is about 514.2519128835.

The spelling of 135996505 in words is "one hundred thirty-five million, nine hundred ninety-six thousand, five hundred five".