133667 has 4 divisors (see below), whose sum is σ = 134400. Its totient is φ = 132936.

The previous prime is 133657. The next prime is 133669. The reversal of 133667 is 766331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 766331 = 41 ⋅18691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133667 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (133669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158 + ... + 540.

It is an arithmetic number, because the mean of its divisors is an integer number (33600).

2¹³³⁶⁶⁷ is an apocalyptic number.

133667 is a deficient number, since it is larger than the sum of its proper divisors (733).

133667 is an equidigital number, since it uses as much as digits as its factorization.

133667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732.

The product of its digits is 2268, while the sum is 26.

The square root of 133667 is about 365.6049780843. The cubic root of 133667 is about 51.1298753130.

Adding to 133667 its reverse (766331), we get a palindrome (899998).

The spelling of 133667 in words is "one hundred thirty-three thousand, six hundred sixty-seven".