133344509 has 2 divisors, whose sum is σ = 133344510. Its totient is φ = 133344508.

The previous prime is 133344493. The next prime is 133344511. The reversal of 133344509 is 905443331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82264900 + 51079609 = 9070^2 + 7147^2 .

It is a cyclic number.

It is not a de Polignac number, because 133344509 - 2⁴ = 133344493 is a prime.

Together with 133344511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133346509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66672254 + 66672255.

It is an arithmetic number, because the mean of its divisors is an integer number (66672255).

Almost surely, 2^133344509 is an apocalyptic number.

It is an amenable number.

133344509 is a deficient number, since it is larger than the sum of its proper divisors (1).

133344509 is an equidigital number, since it uses as much as digits as its factorization.

133344509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 133344509 is about 11547.4892942146. The cubic root of 133344509 is about 510.8872278949.

The spelling of 133344509 in words is "one hundred thirty-three million, three hundred forty-four thousand, five hundred nine".