133405023 has 24 divisors (see below), whose sum is σ = 188976000. Its totient is φ = 83696976.

The previous prime is 133405007. The next prime is 133405033. The reversal of 133405023 is 320504331.

It is not a de Polignac number, because 133405023 - 2⁴ = 133405007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133405033) 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 23 ways as a sum of consecutive naturals, for example, 215208 + ... + 215826.

It is an arithmetic number, because the mean of its divisors is an integer number (7874000).

Almost surely, 2^133405023 is an apocalyptic number.

133405023 is a deficient number, since it is larger than the sum of its proper divisors (55570977).

133405023 is a wasteful number, since it uses less digits than its factorization.

133405023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 133405023 is about 11550.1092202628. The cubic root of 133405023 is about 510.9644993037.

Adding to 133405023 its reverse (320504331), we get a palindrome (453909354).

The spelling of 133405023 in words is "one hundred thirty-three million, four hundred five thousand, twenty-three".