134989909 has 2 divisors, whose sum is σ = 134989910. Its totient is φ = 134989908.

The previous prime is 134989901. The next prime is 134989931. The reversal of 134989909 is 909989431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126562500 + 8427409 = 11250^2 + 2903^2 .

It is a cyclic number.

It is not a de Polignac number, because 134989909 - 2³ = 134989901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134989901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67494954 + 67494955.

It is an arithmetic number, because the mean of its divisors is an integer number (67494955).

Almost surely, 2^134989909 is an apocalyptic number.

It is an amenable number.

134989909 is a deficient number, since it is larger than the sum of its proper divisors (1).

134989909 is an equidigital number, since it uses as much as digits as its factorization.

134989909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 134989909 is about 11618.5157830077. The cubic root of 134989909 is about 512.9800019310.

The spelling of 134989909 in words is "one hundred thirty-four million, nine hundred eighty-nine thousand, nine hundred nine".