133347 has 4 divisors (see below), whose sum is σ = 177800. Its totient is φ = 88896.

The previous prime is 133337. The next prime is 133349. The reversal of 133347 is 743331.

133347 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133347 - 2⁶ = 133283 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

133347 is strictly pandigital in base 7.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (133349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22222 + ... + 22227.

It is an arithmetic number, because the mean of its divisors is an integer number (44450).

2¹³³³⁴⁷ is an apocalyptic number.

133347 is a deficient number, since it is larger than the sum of its proper divisors (44453).

133347 is an equidigital number, since it uses as much as digits as its factorization.

133347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44452.

The product of its digits is 756, while the sum is 21.

The square root of 133347 is about 365.1670850446. The cubic root of 133347 is about 51.0890409159.

Adding to 133347 its reverse (743331), we get a palindrome (876678).

The spelling of 133347 in words is "one hundred thirty-three thousand, three hundred forty-seven".