133623 has 24 divisors (see below), whose sum is σ = 232560. Its totient is φ = 75600.

The previous prime is 133597. The next prime is 133631. The reversal of 133623 is 326331.

It is a happy number.

It is not a de Polignac number, because 133623 - 2⁶ = 133559 is a prime.

It is a super-2 number, since 2×133623² = 35710212258, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 133596 and 133605.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1273 + ... + 1373.

It is an arithmetic number, because the mean of its divisors is an integer number (9690).

2¹³³⁶²³ is an apocalyptic number.

133623 is a deficient number, since it is larger than the sum of its proper divisors (98937).

133623 is a wasteful number, since it uses less digits than its factorization.

133623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 111 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 133623 is about 365.5447988961. The cubic root of 133623 is about 51.1242644506.

Adding to 133623 its reverse (326331), we get a palindrome (459954).

The spelling of 133623 in words is "one hundred thirty-three thousand, six hundred twenty-three".