134204309 has 2 divisors, whose sum is σ = 134204310. Its totient is φ = 134204308.

The previous prime is 134204297. The next prime is 134204311. The reversal of 134204309 is 903402431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67732900 + 66471409 = 8230^2 + 8153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134204309 is a prime.

Together with 134204311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134204359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67102154 + 67102155.

It is an arithmetic number, because the mean of its divisors is an integer number (67102155).

Almost surely, 2^134204309 is an apocalyptic number.

It is an amenable number.

134204309 is a deficient number, since it is larger than the sum of its proper divisors (1).

134204309 is an equidigital number, since it uses as much as digits as its factorization.

134204309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 134204309 is about 11584.6583462785. The cubic root of 134204309 is about 511.9829362904.

The spelling of 134204309 in words is "one hundred thirty-four million, two hundred four thousand, three hundred nine".