133568329 has 2 divisors, whose sum is σ = 133568330. Its totient is φ = 133568328.

The previous prime is 133568311. The next prime is 133568333. The reversal of 133568329 is 923865331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120231225 + 13337104 = 10965^2 + 3652^2 .

It is a cyclic number.

It is not a de Polignac number, because 133568329 - 2¹³ = 133560137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133568291 and 133568300.

It is not a weakly prime, because it can be changed into another prime (133568399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66784164 + 66784165.

It is an arithmetic number, because the mean of its divisors is an integer number (66784165).

Almost surely, 2^133568329 is an apocalyptic number.

It is an amenable number.

133568329 is a deficient number, since it is larger than the sum of its proper divisors (1).

133568329 is an equidigital number, since it uses as much as digits as its factorization.

133568329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 133568329 is about 11557.1765150490. The cubic root of 133568329 is about 511.1729111036.

The spelling of 133568329 in words is "one hundred thirty-three million, five hundred sixty-eight thousand, three hundred twenty-nine".