133843 has 2 divisors, whose sum is σ = 133844. Its totient is φ = 133842.

The previous prime is 133831. The next prime is 133853. The reversal of 133843 is 348331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133843 - 2⁵ = 133811 is a prime.

It is an Ulam number.

133843 is a lucky number.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (133813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66921 + 66922.

It is an arithmetic number, because the mean of its divisors is an integer number (66922).

2¹³³⁸⁴³ is an apocalyptic number.

133843 is a deficient number, since it is larger than the sum of its proper divisors (1).

133843 is an equidigital number, since it uses as much as digits as its factorization.

133843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 133843 is about 365.8455958461. The cubic root of 133843 is about 51.1523064573.

The spelling of 133843 in words is "one hundred thirty-three thousand, eight hundred forty-three".