133453 has 4 divisors (see below), whose sum is σ = 134748. Its totient is φ = 132160.

The previous prime is 133451. The next prime is 133481. The reversal of 133453 is 354331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56169 + 77284 = 237^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 133453 - 2¹ = 133451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133451) 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 in 3 ways as a sum of consecutive naturals, for example, 478 + ... + 703.

It is an arithmetic number, because the mean of its divisors is an integer number (33687).

2¹³³⁴⁵³ is an apocalyptic number.

It is an amenable number.

133453 is a deficient number, since it is larger than the sum of its proper divisors (1295).

133453 is a wasteful number, since it uses less digits than its factorization.

133453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294.

The product of its digits is 540, while the sum is 19.

The square root of 133453 is about 365.3121952522. The cubic root of 133453 is about 51.1025745387.

Adding to 133453 its reverse (354331), we get a palindrome (487784).

The spelling of 133453 in words is "one hundred thirty-three thousand, four hundred fifty-three".