133603 has 8 divisors (see below), whose sum is σ = 146880. Its totient is φ = 120960.

The previous prime is 133597. The next prime is 133631. The reversal of 133603 is 306331.

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 133603 - 2⁵ = 133571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133633) 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, 358 + ... + 628.

It is an arithmetic number, because the mean of its divisors is an integer number (18360).

2¹³³⁶⁰³ is an apocalyptic number.

133603 is a deficient number, since it is larger than the sum of its proper divisors (13277).

133603 is a wasteful number, since it uses less digits than its factorization.

133603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 133603 is about 365.5174414443. The cubic root of 133603 is about 51.1217136515.

Adding to 133603 its reverse (306331), we get a palindrome (439934).

The spelling of 133603 in words is "one hundred thirty-three thousand, six hundred three".