135569329 has 12 divisors (see below), whose sum is σ = 161551908. Its totient is φ = 113366400.

The previous prime is 135569327. The next prime is 135569359. The reversal of 135569329 is 923965531.

It can be written as a sum of positive squares in 2 ways, for example, as 72335025 + 63234304 = 8505^2 + 7952^2 .

It is not a de Polignac number, because 135569329 - 2¹ = 135569327 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135569323) 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 in 11 ways as a sum of consecutive naturals, for example, 31732 + ... + 35749.

It is an arithmetic number, because the mean of its divisors is an integer number (13462659).

Almost surely, 2^135569329 is an apocalyptic number.

It is an amenable number.

135569329 is a deficient number, since it is larger than the sum of its proper divisors (25982579).

135569329 is an equidigital number, since it uses as much as digits as its factorization.

135569329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67536 (or 67529 counting only the distinct ones).

The product of its digits is 218700, while the sum is 43.

The square root of 135569329 is about 11643.4242815419. The cubic root of 135569329 is about 513.7129125514.

The spelling of 135569329 in words is "one hundred thirty-five million, five hundred sixty-nine thousand, three hundred twenty-nine".