134809 has 4 divisors (see below), whose sum is σ = 136116. Its totient is φ = 133504.

The previous prime is 134807. The next prime is 134837. The reversal of 134809 is 908431.

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 27225 + 107584 = 165^2 + 328^2 .

It is a cyclic number.

It is not a de Polignac number, because 134809 - 2¹ = 134807 is a prime.

It is a Duffinian number.

134809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (134807) 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, 484 + ... + 709.

It is an arithmetic number, because the mean of its divisors is an integer number (34029).

2¹³⁴⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

134809 is a deficient number, since it is larger than the sum of its proper divisors (1307).

134809 is a wasteful number, since it uses less digits than its factorization.

134809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 134809 is about 367.1634513401. The cubic root of 134809 is about 51.2750739888.

The spelling of 134809 in words is "one hundred thirty-four thousand, eight hundred nine".