136504209 has 8 divisors (see below), whose sum is σ = 182547040. Its totient is φ = 90732096.

The previous prime is 136504183. The next prime is 136504213. The reversal of 136504209 is 902405631.

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

It is not a de Polignac number, because 136504209 - 2⁵ = 136504177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136504219) 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, 66499 + ... + 68520.

It is an arithmetic number, because the mean of its divisors is an integer number (22818380).

Almost surely, 2^136504209 is an apocalyptic number.

It is an amenable number.

136504209 is a deficient number, since it is larger than the sum of its proper divisors (46042831).

136504209 is a wasteful number, since it uses less digits than its factorization.

136504209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135359.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 136504209 is about 11683.5015727307. The cubic root of 136504209 is about 514.8910555992.

The spelling of 136504209 in words is "one hundred thirty-six million, five hundred four thousand, two hundred nine".