133423 has 4 divisors (see below), whose sum is σ = 139248. Its totient is φ = 127600.

The previous prime is 133417. The next prime is 133439. The reversal of 133423 is 324331.

133423 = T₅₂ + T₅₃ + ... + T₉₇.

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

It is a cyclic number.

It is not a de Polignac number, because 133423 - 2⁵ = 133391 is a prime.

It is a Duffinian number.

133423 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 133397 and 133406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133403) 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, 2878 + ... + 2923.

It is an arithmetic number, because the mean of its divisors is an integer number (34812).

2¹³³⁴²³ is an apocalyptic number.

133423 is a deficient number, since it is larger than the sum of its proper divisors (5825).

133423 is an equidigital number, since it uses as much as digits as its factorization.

133423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5824.

The product of its digits is 216, while the sum is 16.

The square root of 133423 is about 365.2711321744. The cubic root of 133423 is about 51.0987449954.

Adding to 133423 its reverse (324331), we get a palindrome (457754).

The spelling of 133423 in words is "one hundred thirty-three thousand, four hundred twenty-three".