133655 has 4 divisors (see below), whose sum is σ = 160392. Its totient is φ = 106920.

The previous prime is 133649. The next prime is 133657. The reversal of 133655 is 556331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133655 - 2¹⁰ = 132631 is a prime.

It is a d-powerful number, because it can be written as 1 + 3⁷ + 6⁶ + 3⁸ + 5³ + 5⁷ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133655.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 133655.

It is not an unprimeable number, because it can be changed into a prime (133657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13361 + ... + 13370.

It is an arithmetic number, because the mean of its divisors is an integer number (40098).

2¹³³⁶⁵⁵ is an apocalyptic number.

133655 is a deficient number, since it is larger than the sum of its proper divisors (26737).

133655 is an equidigital number, since it uses as much as digits as its factorization.

133655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26736.

The product of its digits is 1350, while the sum is 23.

The square root of 133655 is about 365.5885665608. The cubic root of 133655 is about 51.1283451999.

Adding to 133655 its reverse (556331), we get a palindrome (689986).

The spelling of 133655 in words is "one hundred thirty-three thousand, six hundred fifty-five".