133329381 has 8 divisors (see below), whose sum is σ = 178063104. Its totient is φ = 88740960.

The previous prime is 133329353. The next prime is 133329401. The reversal of 133329381 is 183923331.

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

It is not a de Polignac number, because 133329381 - 2¹⁰ = 133328357 is a prime.

It is a super-2 number, since 2×133329381² = 35553447675686322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133329281) 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, 34165 + ... + 37866.

It is an arithmetic number, because the mean of its divisors is an integer number (22257888).

Almost surely, 2^133329381 is an apocalyptic number.

It is an amenable number.

133329381 is a deficient number, since it is larger than the sum of its proper divisors (44733723).

133329381 is an equidigital number, since it uses as much as digits as its factorization.

133329381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72651.

The product of its digits is 11664, while the sum is 33.

The square root of 133329381 is about 11546.8342414707. The cubic root of 133329381 is about 510.8679070286.

The spelling of 133329381 in words is "one hundred thirty-three million, three hundred twenty-nine thousand, three hundred eighty-one".