133936389 has 8 divisors (see below), whose sum is σ = 198424320. Its totient is φ = 89290908.

The previous prime is 133936379. The next prime is 133936391. The reversal of 133936389 is 983639331.

133936389 is a `hidden beast` number, since 1 + 3 + 3 + 9 + 3 + 638 + 9 = 666.

It is not a de Polignac number, because 133936389 - 2⁸ = 133936133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133936349) 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 in 7 ways as a sum of consecutive naturals, for example, 2480277 + ... + 2480330.

It is an arithmetic number, because the mean of its divisors is an integer number (24803040).

Almost surely, 2^133936389 is an apocalyptic number.

It is an amenable number.

133936389 is a deficient number, since it is larger than the sum of its proper divisors (64487931).

133936389 is an equidigital number, since it uses as much as digits as its factorization.

133936389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960616 (or 4960610 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 133936389 is about 11573.0889999170. The cubic root of 133936389 is about 511.6420087122.

The spelling of 133936389 in words is "one hundred thirty-three million, nine hundred thirty-six thousand, three hundred eighty-nine".