133509800 has 24 divisors (see below), whose sum is σ = 310410750. Its totient is φ = 53403840.

The previous prime is 133509793. The next prime is 133509833. The reversal of 133509800 is 8905331.

It can be written as a sum of positive squares in 3 ways, for example, as 123787876 + 9721924 = 11126^2 + 3118^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333575 + ... + 333974.

Almost surely, 2^133509800 is an apocalyptic number.

133509800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133509800 is an abundant number, since it is smaller than the sum of its proper divisors (176900950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133509800 is a wasteful number, since it uses less digits than its factorization.

133509800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667565 (or 667556 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 133509800 is about 11554.6440879847. The cubic root of 133509800 is about 511.0982356905.

The spelling of 133509800 in words is "one hundred thirty-three million, five hundred nine thousand, eight hundred".