133412423 has 4 divisors (see below), whose sum is σ = 133995240. Its totient is φ = 132829608.

The previous prime is 133412407. The next prime is 133412449. The reversal of 133412423 is 324214331.

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 133412423 - 2⁴ = 133412407 is a prime.

It is a super-2 number, since 2×133412423² = 35597749221461858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133412723) 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, 291065 + ... + 291522.

It is an arithmetic number, because the mean of its divisors is an integer number (33498810).

Almost surely, 2^133412423 is an apocalyptic number.

133412423 is a deficient number, since it is larger than the sum of its proper divisors (582817).

133412423 is an equidigital number, since it uses as much as digits as its factorization.

133412423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582816.

The product of its digits is 1728, while the sum is 23.

The square root of 133412423 is about 11550.4295591116. The cubic root of 133412423 is about 510.9739468924.

Adding to 133412423 its reverse (324214331), we get a palindrome (457626754).

The spelling of 133412423 in words is "one hundred thirty-three million, four hundred twelve thousand, four hundred twenty-three".