133509899 has 8 divisors (see below), whose sum is σ = 138417552. Its totient is φ = 128680960.

The previous prime is 133509889. The next prime is 133509911. The reversal of 133509899 is 998905331.

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

It is not a de Polignac number, because 133509899 - 2⁸ = 133509643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133509889) 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, 16214 + ... + 23019.

It is an arithmetic number, because the mean of its divisors is an integer number (17302194).

Almost surely, 2^133509899 is an apocalyptic number.

133509899 is a deficient number, since it is larger than the sum of its proper divisors (4907653).

133509899 is an equidigital number, since it uses as much as digits as its factorization.

133509899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39357.

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 133509899 is about 11554.6483719757. The cubic root of 133509899 is about 511.0983620201.

The spelling of 133509899 in words is "one hundred thirty-three million, five hundred nine thousand, eight hundred ninety-nine".