133728583 has 8 divisors (see below), whose sum is σ = 138615552. Its totient is φ = 128926776.

The previous prime is 133728563. The next prime is 133728611. The reversal of 133728583 is 385827331.

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 133728583 - 2⁹ = 133728071 is a prime.

It is a super-2 number, since 2×133728583² = 35766667822375778, 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 (133728563) 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, 18085 + ... + 24382.

It is an arithmetic number, because the mean of its divisors is an integer number (17326944).

Almost surely, 2^133728583 is an apocalyptic number.

133728583 is a deficient number, since it is larger than the sum of its proper divisors (4886969).

133728583 is an equidigital number, since it uses as much as digits as its factorization.

133728583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42581.

The product of its digits is 120960, while the sum is 40.

The square root of 133728583 is about 11564.1075314959. The cubic root of 133728583 is about 511.3772628508.

The spelling of 133728583 in words is "one hundred thirty-three million, seven hundred twenty-eight thousand, five hundred eighty-three".