136888509 has 8 divisors (see below), whose sum is σ = 182809792. Its totient is φ = 91113120.

The previous prime is 136888481. The next prime is 136888513. The reversal of 136888509 is 905888631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136888509 - 2⁹ = 136887997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136888579) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 34264 + ... + 38049.

It is an arithmetic number, because the mean of its divisors is an integer number (22851224).

Almost surely, 2^136888509 is an apocalyptic number.

It is an amenable number.

136888509 is a deficient number, since it is larger than the sum of its proper divisors (45921283).

136888509 is an equidigital number, since it uses as much as digits as its factorization.

136888509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72947.

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 136888509 is about 11699.9362818778. The cubic root of 136888509 is about 515.3737934182.

The spelling of 136888509 in words is "one hundred thirty-six million, eight hundred eighty-eight thousand, five hundred nine".