133503423 has 4 divisors (see below), whose sum is σ = 178004568. Its totient is φ = 89002280.

The previous prime is 133503413. The next prime is 133503427. The reversal of 133503423 is 324305331.

It is a happy number.

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 133503423 - 2⁴ = 133503407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133503393 and 133503402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133503427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22250568 + ... + 22250573.

It is an arithmetic number, because the mean of its divisors is an integer number (44501142).

Almost surely, 2^133503423 is an apocalyptic number.

133503423 is a deficient number, since it is larger than the sum of its proper divisors (44501145).

133503423 is an equidigital number, since it uses as much as digits as its factorization.

133503423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44501144.

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 133503423 is about 11554.3681350388. The cubic root of 133503423 is about 511.0900981472.

Adding to 133503423 its reverse (324305331), we get a palindrome (457808754).

The spelling of 133503423 in words is "one hundred thirty-three million, five hundred three thousand, four hundred twenty-three".