134431009 has 4 divisors (see below), whose sum is σ = 134776980. Its totient is φ = 134085040.

The previous prime is 134431001. The next prime is 134431013. The reversal of 134431009 is 900134431.

It is a happy number.

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 47568609 + 86862400 = 6897^2 + 9320^2 .

It is a cyclic number.

It is not a de Polignac number, because 134431009 - 2³ = 134431001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134431001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172402 + ... + 173179.

It is an arithmetic number, because the mean of its divisors is an integer number (33694245).

Almost surely, 2^134431009 is an apocalyptic number.

It is an amenable number.

134431009 is a deficient number, since it is larger than the sum of its proper divisors (345971).

134431009 is an equidigital number, since it uses as much as digits as its factorization.

134431009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345970.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 134431009 is about 11594.4387100023. The cubic root of 134431009 is about 512.2710572904.

The spelling of 134431009 in words is "one hundred thirty-four million, four hundred thirty-one thousand, nine".