133444 has 12 divisors (see below), whose sum is σ = 237244. Its totient is φ = 65664.

The previous prime is 133439. The next prime is 133447. The reversal of 133444 is 444331.

It can be written as a sum of positive squares in 2 ways, for example, as 97344 + 36100 = 312^2 + 190^2 .

It is a super-2 number, since 2×133444² = 35614602272, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64 + ... + 520.

2¹³³⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

133444 is a deficient number, since it is larger than the sum of its proper divisors (103800).

133444 is a wasteful number, since it uses less digits than its factorization.

133444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 532 counting only the distinct ones).

The product of its digits is 576, while the sum is 19.

The square root of 133444 is about 365.2998768136. The cubic root of 133444 is about 51.1014257360.

Adding to 133444 its reverse (444331), we get a palindrome (577775).

It can be divided in two parts, 1334 and 44, that added together give a triangular number (1378 = T₅₂).

The spelling of 133444 in words is "one hundred thirty-three thousand, four hundred forty-four".