133991112 has 32 divisors (see below), whose sum is σ = 335534400. Its totient is φ = 44589504.

The previous prime is 133991101. The next prime is 133991153. The reversal of 133991112 is 211199331.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 133991112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11214 + ... + 19842.

It is an arithmetic number, because the mean of its divisors is an integer number (10485450).

Almost surely, 2^133991112 is an apocalyptic number.

133991112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133991112 is an abundant number, since it is smaller than the sum of its proper divisors (201543288).

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

133991112 is a wasteful number, since it uses less digits than its factorization.

133991112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9285 (or 9281 counting only the distinct ones).

The product of its digits is 1458, while the sum is 30.

The square root of 133991112 is about 11575.4529932958. The cubic root of 133991112 is about 511.7116805257.

The spelling of 133991112 in words is "one hundred thirty-three million, nine hundred ninety-one thousand, one hundred twelve".