135704609 has 2 divisors, whose sum is σ = 135704610. Its totient is φ = 135704608.

The previous prime is 135704573. The next prime is 135704731. The reversal of 135704609 is 906407531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132319009 + 3385600 = 11503^2 + 1840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135704609 is a prime.

It is not a weakly prime, because it can be changed into another prime (135704909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67852304 + 67852305.

It is an arithmetic number, because the mean of its divisors is an integer number (67852305).

Almost surely, 2^135704609 is an apocalyptic number.

It is an amenable number.

135704609 is a deficient number, since it is larger than the sum of its proper divisors (1).

135704609 is an equidigital number, since it uses as much as digits as its factorization.

135704609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 135704609 is about 11649.2321206164. The cubic root of 135704609 is about 513.8837279330.

The spelling of 135704609 in words is "one hundred thirty-five million, seven hundred four thousand, six hundred nine".