133604399 has 2 divisors, whose sum is σ = 133604400. Its totient is φ = 133604398.

The previous prime is 133604357. The next prime is 133604413. The reversal of 133604399 is 993406331.

It is a strong prime.

It is an emirp because it is prime and its reverse (993406331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133604399 - 2²⁰ = 132555823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133604329) 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, 66802199 + 66802200.

It is an arithmetic number, because the mean of its divisors is an integer number (66802200).

Almost surely, 2^133604399 is an apocalyptic number.

133604399 is a deficient number, since it is larger than the sum of its proper divisors (1).

133604399 is an equidigital number, since it uses as much as digits as its factorization.

133604399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 133604399 is about 11558.7369119640. The cubic root of 133604399 is about 511.2189208814.

The spelling of 133604399 in words is "one hundred thirty-three million, six hundred four thousand, three hundred ninety-nine".