134784209 has 16 divisors (see below), whose sum is σ = 161471232. Its totient is φ = 110001408.

The previous prime is 134784131. The next prime is 134784217. The reversal of 134784209 is 902487431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134784209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134784509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35717 + ... + 39309.

It is an arithmetic number, because the mean of its divisors is an integer number (10091952).

Almost surely, 2^134784209 is an apocalyptic number.

It is an amenable number.

134784209 is a deficient number, since it is larger than the sum of its proper divisors (26687023).

134784209 is a wasteful number, since it uses less digits than its factorization.

134784209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 134784209 is about 11609.6601586782. The cubic root of 134784209 is about 512.7193068160.

The spelling of 134784209 in words is "one hundred thirty-four million, seven hundred eighty-four thousand, two hundred nine".