133428563 has 4 divisors (see below), whose sum is σ = 141277320. Its totient is φ = 125579808.

The previous prime is 133428553. The next prime is 133428571. The reversal of 133428563 is 365824331.

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 133428563 - 2²⁶ = 66319699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133428553) 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 3 ways as a sum of consecutive naturals, for example, 3924353 + ... + 3924386.

It is an arithmetic number, because the mean of its divisors is an integer number (35319330).

Almost surely, 2^133428563 is an apocalyptic number.

133428563 is a deficient number, since it is larger than the sum of its proper divisors (7848757).

133428563 is an equidigital number, since it uses as much as digits as its factorization.

133428563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7848756.

The product of its digits is 51840, while the sum is 35.

The square root of 133428563 is about 11551.1282132959. The cubic root of 133428563 is about 510.9945516376.

The spelling of 133428563 in words is "one hundred thirty-three million, four hundred twenty-eight thousand, five hundred sixty-three".