134236209 has 4 divisors (see below), whose sum is σ = 178981616. Its totient is φ = 89490804.

The previous prime is 134236187. The next prime is 134236213. The reversal of 134236209 is 902632431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 902632431 = 3 ⋅300877477.

It is not a de Polignac number, because 134236209 - 2⁵ = 134236177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134237209) 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, 22372699 + ... + 22372704.

It is an arithmetic number, because the mean of its divisors is an integer number (44745404).

Almost surely, 2^134236209 is an apocalyptic number.

It is an amenable number.

134236209 is a deficient number, since it is larger than the sum of its proper divisors (44745407).

134236209 is an equidigital number, since it uses as much as digits as its factorization.

134236209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44745406.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 134236209 is about 11586.0350853948. The cubic root of 134236209 is about 512.0234987282.

The spelling of 134236209 in words is "one hundred thirty-four million, two hundred thirty-six thousand, two hundred nine".