133721299 has 2 divisors, whose sum is σ = 133721300. Its totient is φ = 133721298.

The previous prime is 133721267. The next prime is 133721339. The reversal of 133721299 is 992127331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133721299 - 2⁵ = 133721267 is a prime.

It is not a weakly prime, because it can be changed into another prime (133725299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66860649 + 66860650.

It is an arithmetic number, because the mean of its divisors is an integer number (66860650).

Almost surely, 2^133721299 is an apocalyptic number.

133721299 is a deficient number, since it is larger than the sum of its proper divisors (1).

133721299 is an equidigital number, since it uses as much as digits as its factorization.

133721299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 133721299 is about 11563.7925872094. The cubic root of 133721299 is about 511.3679780255.

The spelling of 133721299 in words is "one hundred thirty-three million, seven hundred twenty-one thousand, two hundred ninety-nine".