133509959 has 8 divisors (see below), whose sum is σ = 154214928. Its totient is φ = 114232960.

The previous prime is 133509947. The next prime is 133509983. The reversal of 133509959 is 959905331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133509959 - 2²⁰ = 132461383 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 (133509989) 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 7 ways as a sum of consecutive naturals, for example, 356792 + ... + 357165.

It is an arithmetic number, because the mean of its divisors is an integer number (19276866).

Almost surely, 2^133509959 is an apocalyptic number.

133509959 is a deficient number, since it is larger than the sum of its proper divisors (20704969).

133509959 is a wasteful number, since it uses less digits than its factorization.

133509959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713985.

The product of its (nonzero) digits is 164025, while the sum is 44.

The square root of 133509959 is about 11554.6509683331. The cubic root of 133509959 is about 511.0984385834.

The spelling of 133509959 in words is "one hundred thirty-three million, five hundred nine thousand, nine hundred fifty-nine".