135999005 has 8 divisors (see below), whose sum is σ = 164295000. Its totient is φ = 108068416.

The previous prime is 135998987. The next prime is 135999011. The reversal of 135999005 is 500999531.

It can be written as a sum of positive squares in 4 ways, for example, as 4713241 + 131285764 = 2171^2 + 11458^2 .

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 135999005 - 2²⁶ = 68890141 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 90530 + ... + 92019.

It is an arithmetic number, because the mean of its divisors is an integer number (20536875).

Almost surely, 2^135999005 is an apocalyptic number.

It is an amenable number.

135999005 is a deficient number, since it is larger than the sum of its proper divisors (28295995).

135999005 is a wasteful number, since it uses less digits than its factorization.

135999005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182703.

The product of its (nonzero) digits is 54675, while the sum is 41.

The square root of 135999005 is about 11661.8611293395. The cubic root of 135999005 is about 514.2550639986.

The spelling of 135999005 in words is "one hundred thirty-five million, nine hundred ninety-nine thousand, five".