134609 has 2 divisors, whose sum is σ = 134610. Its totient is φ = 134608.

The previous prime is 134597. The next prime is 134639. The reversal of 134609 is 906431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124609 + 10000 = 353^2 + 100^2 .

It is an emirp because it is prime and its reverse (906431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134609 - 2⁴ = 134593 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (134639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67304 + 67305.

It is an arithmetic number, because the mean of its divisors is an integer number (67305).

2¹³⁴⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

134609 is a deficient number, since it is larger than the sum of its proper divisors (1).

134609 is an equidigital number, since it uses as much as digits as its factorization.

134609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 134609 is about 366.8909919854. The cubic root of 134609 is about 51.2497045392.

The spelling of 134609 in words is "one hundred thirty-four thousand, six hundred nine".