133199 has 4 divisors (see below), whose sum is σ = 145320. Its totient is φ = 121080.

The previous prime is 133187. The next prime is 133201. The reversal of 133199 is 991331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991331 = 11 ⋅90121.

It is a cyclic number.

It is not a de Polignac number, because 133199 - 2⁴ = 133183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133109) 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, 6044 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (36330).

2¹³³¹⁹⁹ is an apocalyptic number.

133199 is a deficient number, since it is larger than the sum of its proper divisors (12121).

133199 is a wasteful number, since it uses less digits than its factorization.

133199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12120.

The product of its digits is 729, while the sum is 26.

The square root of 133199 is about 364.9643818238. The cubic root of 133199 is about 51.0701329111.

Adding to 133199 its sum of digits (26), we get a square (133225 = 365²).

It can be divided in two parts, 1331 and 99, that multiplied together give a square (131769 = 363²).

The spelling of 133199 in words is "one hundred thirty-three thousand, one hundred ninety-nine".