134309509 has 4 divisors (see below), whose sum is σ = 134694700. Its totient is φ = 133924320.

The previous prime is 134309507. The next prime is 134309533. The reversal of 134309509 is 905903431.

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 122213025 + 12096484 = 11055^2 + 3478^2 .

It is a cyclic number.

It is not a de Polignac number, because 134309509 - 2¹ = 134309507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134309501) 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, 192072 + ... + 192769.

It is an arithmetic number, because the mean of its divisors is an integer number (33673675).

Almost surely, 2^134309509 is an apocalyptic number.

It is an amenable number.

134309509 is a deficient number, since it is larger than the sum of its proper divisors (385191).

134309509 is an equidigital number, since it uses as much as digits as its factorization.

134309509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385190.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 134309509 is about 11589.1979446379. The cubic root of 134309509 is about 512.1166789847.

The spelling of 134309509 in words is "one hundred thirty-four million, three hundred nine thousand, five hundred nine".