133342423 has 4 divisors (see below), whose sum is σ = 133372240. Its totient is φ = 133312608.

The previous prime is 133342409. The next prime is 133342427. The reversal of 133342423 is 324243331.

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 133342423 - 2⁹ = 133341911 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 (133342427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6690 + ... + 17647.

It is an arithmetic number, because the mean of its divisors is an integer number (33343060).

Almost surely, 2^133342423 is an apocalyptic number.

133342423 is a deficient number, since it is larger than the sum of its proper divisors (29817).

133342423 is an equidigital number, since it uses as much as digits as its factorization.

133342423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29816.

The product of its digits is 5184, while the sum is 25.

The square root of 133342423 is about 11547.3989711969. The cubic root of 133342423 is about 510.8845638274.

Adding to 133342423 its reverse (324243331), we get a palindrome (457585754).

The spelling of 133342423 in words is "one hundred thirty-three million, three hundred forty-two thousand, four hundred twenty-three".