135608569 has 2 divisors, whose sum is σ = 135608570. Its totient is φ = 135608568.

The previous prime is 135608537. The next prime is 135608573. The reversal of 135608569 is 965806531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89870400 + 45738169 = 9480^2 + 6763^2 .

It is a cyclic number.

It is not a de Polignac number, because 135608569 - 2⁵ = 135608537 is a prime.

It is a super-2 number, since 2×135608569² = 36779367972455522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135608519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67804284 + 67804285.

It is an arithmetic number, because the mean of its divisors is an integer number (67804285).

Almost surely, 2^135608569 is an apocalyptic number.

It is an amenable number.

135608569 is a deficient number, since it is larger than the sum of its proper divisors (1).

135608569 is an equidigital number, since it uses as much as digits as its factorization.

135608569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 135608569 is about 11645.1092309175. The cubic root of 135608569 is about 513.7624718193.

The spelling of 135608569 in words is "one hundred thirty-five million, six hundred eight thousand, five hundred sixty-nine".