133523433 has 6 divisors (see below), whose sum is σ = 192867194. Its totient is φ = 89015616.

The previous prime is 133523419. The next prime is 133523459. The reversal of 133523433 is 334325331.

It is a happy number.

133523433 is a `hidden beast` number, since 133 + 523 + 4 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 118984464 + 14538969 = 10908^2 + 3813^2 .

It is not a de Polignac number, because 133523433 - 2¹³ = 133515241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133523397 and 133523406.

It is not an unprimeable number, because it can be changed into a prime (133523413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7417960 + ... + 7417977.

Almost surely, 2^133523433 is an apocalyptic number.

It is an amenable number.

133523433 is a deficient number, since it is larger than the sum of its proper divisors (59343761).

133523433 is a wasteful number, since it uses less digits than its factorization.

133523433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14835943 (or 14835940 counting only the distinct ones).

The product of its digits is 9720, while the sum is 27.

The square root of 133523433 is about 11555.2340088810. The cubic root of 133523433 is about 511.1156315798.

Adding to 133523433 its reverse (334325331), we get a palindrome (467848764).

It can be divided in two parts, 133523 and 433, that added together give a square (133956 = 366²).

The spelling of 133523433 in words is "one hundred thirty-three million, five hundred twenty-three thousand, four hundred thirty-three".