133611838 has 16 divisors (see below), whose sum is σ = 214428240. Its totient is φ = 62251200.

The previous prime is 133611817. The next prime is 133611839. The reversal of 133611838 is 838116331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133611839) 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, 26503 + ... + 31138.

It is an arithmetic number, because the mean of its divisors is an integer number (13401765).

Almost surely, 2^133611838 is an apocalyptic number.

133611838 is a deficient number, since it is larger than the sum of its proper divisors (80816402).

133611838 is a wasteful number, since it uses less digits than its factorization.

133611838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57723.

The product of its digits is 10368, while the sum is 34.

The square root of 133611838 is about 11559.0586987003. The cubic root of 133611838 is about 511.2284088099.

The spelling of 133611838 in words is "one hundred thirty-three million, six hundred eleven thousand, eight hundred thirty-eight".