133529309 has 2 divisors, whose sum is σ = 133529310. Its totient is φ = 133529308.

The previous prime is 133529299. The next prime is 133529317. The reversal of 133529309 is 903925331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131560900 + 1968409 = 11470^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 133529309 - 2¹² = 133525213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133529399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66764654 + 66764655.

It is an arithmetic number, because the mean of its divisors is an integer number (66764655).

Almost surely, 2^133529309 is an apocalyptic number.

It is an amenable number.

133529309 is a deficient number, since it is larger than the sum of its proper divisors (1).

133529309 is an equidigital number, since it uses as much as digits as its factorization.

133529309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 133529309 is about 11555.4882631588. The cubic root of 133529309 is about 511.1231290687.

The spelling of 133529309 in words is "one hundred thirty-three million, five hundred twenty-nine thousand, three hundred nine".