134199509 has 2 divisors, whose sum is σ = 134199510. Its totient is φ = 134199508.

The previous prime is 134199497. The next prime is 134199529. The reversal of 134199509 is 905991431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73702225 + 60497284 = 8585^2 + 7778^2 .

It is a cyclic number.

It is not a de Polignac number, because 134199509 - 2⁴ = 134199493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134199529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67099754 + 67099755.

It is an arithmetic number, because the mean of its divisors is an integer number (67099755).

Almost surely, 2^134199509 is an apocalyptic number.

It is an amenable number.

134199509 is a deficient number, since it is larger than the sum of its proper divisors (1).

134199509 is an equidigital number, since it uses as much as digits as its factorization.

134199509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 134199509 is about 11584.4511738796. The cubic root of 134199509 is about 511.9768322952.

The spelling of 134199509 in words is "one hundred thirty-four million, one hundred ninety-nine thousand, five hundred nine".