133423656 has 32 divisors (see below), whose sum is σ = 334152000. Its totient is φ = 44395520.

The previous prime is 133423651. The next prime is 133423669. The reversal of 133423656 is 656324331.

133423656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (133423651) 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, 9736 + ... + 19016.

It is an arithmetic number, because the mean of its divisors is an integer number (10442250).

Almost surely, 2^133423656 is an apocalyptic number.

It is an amenable number.

133423656 is an abundant number, since it is smaller than the sum of its proper divisors (200728344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133423656 is a wasteful number, since it uses less digits than its factorization.

133423656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9889 (or 9885 counting only the distinct ones).

The product of its digits is 38880, while the sum is 33.

The square root of 133423656 is about 11550.9158078483. The cubic root of 133423656 is about 510.9882874092.

Adding to 133423656 its reverse (656324331), we get a palindrome (789747987).

The spelling of 133423656 in words is "one hundred thirty-three million, four hundred twenty-three thousand, six hundred fifty-six".