134918809 has 2 divisors, whose sum is σ = 134918810. Its totient is φ = 134918808.

The previous prime is 134918803. The next prime is 134918813. The reversal of 134918809 is 908819431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95981209 + 38937600 = 9797^2 + 6240^2 .

It is a cyclic number.

It is not a de Polignac number, because 134918809 - 2¹⁹ = 134394521 is a prime.

It is not a weakly prime, because it can be changed into another prime (134918803) 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, 67459404 + 67459405.

It is an arithmetic number, because the mean of its divisors is an integer number (67459405).

Almost surely, 2^134918809 is an apocalyptic number.

It is an amenable number.

134918809 is a deficient number, since it is larger than the sum of its proper divisors (1).

134918809 is an equidigital number, since it uses as much as digits as its factorization.

134918809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 134918809 is about 11615.4556087999. The cubic root of 134918809 is about 512.8899228928.

The spelling of 134918809 in words is "one hundred thirty-four million, nine hundred eighteen thousand, eight hundred nine".