133445423 has 8 divisors (see below), whose sum is σ = 135530496. Its totient is φ = 131366200.

The previous prime is 133445413. The next prime is 133445437. The reversal of 133445423 is 324544331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133445423 - 2⁴ = 133445407 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 (133445413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72290 + ... + 74112.

It is an arithmetic number, because the mean of its divisors is an integer number (16941312).

Almost surely, 2^133445423 is an apocalyptic number.

133445423 is a deficient number, since it is larger than the sum of its proper divisors (2085073).

133445423 is a wasteful number, since it uses less digits than its factorization.

133445423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925.

The product of its digits is 17280, while the sum is 29.

The square root of 133445423 is about 11551.8579890856. The cubic root of 133445423 is about 511.0160737792.

Adding to 133445423 its reverse (324544331), we get a palindrome (457989754).

The spelling of 133445423 in words is "one hundred thirty-three million, four hundred forty-five thousand, four hundred twenty-three".