133799 has 4 divisors (see below), whose sum is σ = 135864. Its totient is φ = 131736.

The previous prime is 133781. The next prime is 133801. The reversal of 133799 is 997331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 997331 = 127 ⋅7853.

It is a cyclic number.

It is not a de Polignac number, because 133799 - 2⁸ = 133543 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133709) 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, 932 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (33966).

2¹³³⁷⁹⁹ is an apocalyptic number.

133799 is a deficient number, since it is larger than the sum of its proper divisors (2065).

133799 is an equidigital number, since it uses as much as digits as its factorization.

133799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064.

The product of its digits is 5103, while the sum is 32.

The square root of 133799 is about 365.7854562445. The cubic root of 133799 is about 51.1467005156.

The spelling of 133799 in words is "one hundred thirty-three thousand, seven hundred ninety-nine".