133508869 has 8 divisors (see below), whose sum is σ = 144184320. Its totient is φ = 122891376.

The previous prime is 133508863. The next prime is 133508887. The reversal of 133508869 is 968805331.

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 133508869 - 2³ = 133508861 is a prime.

It is a super-2 number, since 2×133508869² = 35649236203318322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133508861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9637 + ... + 18970.

It is an arithmetic number, because the mean of its divisors is an integer number (18023040).

Almost surely, 2^133508869 is an apocalyptic number.

It is an amenable number.

133508869 is a deficient number, since it is larger than the sum of its proper divisors (10675451).

133508869 is a wasteful number, since it uses less digits than its factorization.

133508869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28979.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 133508869 is about 11554.6038010829. The cubic root of 133508869 is about 511.0970476789.

The spelling of 133508869 in words is "one hundred thirty-three million, five hundred eight thousand, eight hundred sixty-nine".