134239309 has 2 divisors, whose sum is σ = 134239310. Its totient is φ = 134239308.

The previous prime is 134239307. The next prime is 134239349. The reversal of 134239309 is 903932431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134050084 + 189225 = 11578^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 134239309 - 2¹ = 134239307 is a prime.

Together with 134239307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134239307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67119654 + 67119655.

It is an arithmetic number, because the mean of its divisors is an integer number (67119655).

Almost surely, 2^134239309 is an apocalyptic number.

It is an amenable number.

134239309 is a deficient number, since it is larger than the sum of its proper divisors (1).

134239309 is an equidigital number, since it uses as much as digits as its factorization.

134239309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 134239309 is about 11586.1688663682. The cubic root of 134239309 is about 512.0274401899.

The spelling of 134239309 in words is "one hundred thirty-four million, two hundred thirty-nine thousand, three hundred nine".