133509243 has 32 divisors (see below), whose sum is σ = 215631360. Its totient is φ = 71850240.

The previous prime is 133509241. The next prime is 133509247. The reversal of 133509243 is 342905331.

It is not a de Polignac number, because 133509243 - 2¹ = 133509241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133509243.

It is not an unprimeable number, because it can be changed into a prime (133509241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22296 + ... + 27642.

It is an arithmetic number, because the mean of its divisors is an integer number (6738480).

Almost surely, 2^133509243 is an apocalyptic number.

133509243 is a deficient number, since it is larger than the sum of its proper divisors (82122117).

133509243 is a wasteful number, since it uses less digits than its factorization.

133509243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5427.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 133509243 is about 11554.6199850969. The cubic root of 133509243 is about 511.0975249259.

The spelling of 133509243 in words is "one hundred thirty-three million, five hundred nine thousand, two hundred forty-three".