133813138 has 8 divisors (see below), whose sum is σ = 204010380. Its totient is φ = 65809680.

The previous prime is 133813117. The next prime is 133813139. The reversal of 133813138 is 831318331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 129663769 + 4149369 = 11387^2 + 2037^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (133813139) 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 3 ways as a sum of consecutive naturals, for example, 548293 + ... + 548536.

Almost surely, 2^133813138 is an apocalyptic number.

133813138 is a deficient number, since it is larger than the sum of its proper divisors (70197242).

133813138 is a wasteful number, since it uses less digits than its factorization.

133813138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096892.

The product of its digits is 5184, while the sum is 31.

The square root of 133813138 is about 11567.7628779293. The cubic root of 133813138 is about 511.4850194062.

The spelling of 133813138 in words is "one hundred thirty-three million, eight hundred thirteen thousand, one hundred thirty-eight".