133204423 has 12 divisors (see below), whose sum is σ = 149184504. Its totient is φ = 118804400.

The previous prime is 133204417. The next prime is 133204433. The reversal of 133204423 is 324402331.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-133204423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133204394 and 133204403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133204433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3973 + ... + 16798.

It is an arithmetic number, because the mean of its divisors is an integer number (12432042).

Almost surely, 2^133204423 is an apocalyptic number.

133204423 is a deficient number, since it is larger than the sum of its proper divisors (15980081).

133204423 is a wasteful number, since it uses less digits than its factorization.

133204423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20846 (or 20835 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 133204423 is about 11541.4220527628. The cubic root of 133204423 is about 510.7082598331.

Adding to 133204423 its reverse (324402331), we get a palindrome (457606754).

The spelling of 133204423 in words is "one hundred thirty-three million, two hundred four thousand, four hundred twenty-three".