133844 has 6 divisors (see below), whose sum is σ = 234234. Its totient is φ = 66920.

The previous prime is 133843. The next prime is 133853. The reversal of 133844 is 448331.

It can be written as a sum of positive squares in only one way, i.e., 114244 + 19600 = 338^2 + 140^2 .

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16727 + ... + 16734.

It is an arithmetic number, because the mean of its divisors is an integer number (39039).

2¹³³⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

133844 is a deficient number, since it is larger than the sum of its proper divisors (100390).

133844 is a wasteful number, since it uses less digits than its factorization.

133844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33465 (or 33463 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 133844 is about 365.8469625403. The cubic root of 133844 is about 51.1524338508.

The spelling of 133844 in words is "one hundred thirty-three thousand, eight hundred forty-four".