135827809 has 8 divisors (see below), whose sum is σ = 146374592. Its totient is φ = 125295120.

The previous prime is 135827779. The next prime is 135827819. The reversal of 135827809 is 908728531.

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 135827809 - 2¹⁹ = 135303521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135827819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25252 + ... + 30154.

It is an arithmetic number, because the mean of its divisors is an integer number (18296824).

Almost surely, 2^135827809 is an apocalyptic number.

It is an amenable number.

135827809 is a deficient number, since it is larger than the sum of its proper divisors (10546783).

135827809 is a wasteful number, since it uses less digits than its factorization.

135827809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 135827809 is about 11654.5188231861. The cubic root of 135827809 is about 514.0391913977.

The spelling of 135827809 in words is "one hundred thirty-five million, eight hundred twenty-seven thousand, eight hundred nine".