133943 has 4 divisors (see below), whose sum is σ = 141840. Its totient is φ = 126048.

The previous prime is 133919. The next prime is 133949. The reversal of 133943 is 349331.

133943 is digitally balanced in base 2, 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3923 + ... + 3956.

It is an arithmetic number, because the mean of its divisors is an integer number (35460).

2¹³³⁹⁴³ is an apocalyptic number.

133943 is a deficient number, since it is larger than the sum of its proper divisors (7897).

133943 is an equidigital number, since it uses as much as digits as its factorization.

133943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7896.

The product of its digits is 972, while the sum is 23.

The square root of 133943 is about 365.9822400063. The cubic root of 133943 is about 51.1650426663.

The spelling of 133943 in words is "one hundred thirty-three thousand, nine hundred forty-three".