134204509 has 4 divisors (see below), whose sum is σ = 134234716. Its totient is φ = 134174304.

The previous prime is 134204507. The next prime is 134204519. The reversal of 134204509 is 905402431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89019225 + 45185284 = 9435^2 + 6722^2 .

It is a cyclic number.

It is not a de Polignac number, because 134204509 - 2¹ = 134204507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134204501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6984 + ... + 17809.

It is an arithmetic number, because the mean of its divisors is an integer number (33558679).

Almost surely, 2^134204509 is an apocalyptic number.

It is an amenable number.

134204509 is a deficient number, since it is larger than the sum of its proper divisors (30207).

134204509 is an equidigital number, since it uses as much as digits as its factorization.

134204509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30206.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 134204509 is about 11584.6669783814. Note that the first 3 decimals coincide. The cubic root of 134204509 is about 511.9831906204.

The spelling of 134204509 in words is "one hundred thirty-four million, two hundred four thousand, five hundred nine".