133885453 has 4 divisors (see below), whose sum is σ = 144184348. Its totient is φ = 123586560.

The previous prime is 133885447. The next prime is 133885501. The reversal of 133885453 is 354588331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354588331 = 4759 ⋅74509.

It can be written as a sum of positive squares in 2 ways, for example, as 43007364 + 90878089 = 6558^2 + 9533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133885453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133885253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5149428 + ... + 5149453.

It is an arithmetic number, because the mean of its divisors is an integer number (36046087).

Almost surely, 2^133885453 is an apocalyptic number.

133885453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

133885453 is a deficient number, since it is larger than the sum of its proper divisors (10298895).

133885453 is a wasteful number, since it uses less digits than its factorization.

133885453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10298894.

The product of its digits is 172800, while the sum is 40.

The square root of 133885453 is about 11570.8881681572. Note that the first 3 decimals coincide. The cubic root of 133885453 is about 511.5771413476.

The spelling of 133885453 in words is "one hundred thirty-three million, eight hundred eighty-five thousand, four hundred fifty-three".