133791 has 16 divisors (see below), whose sum is σ = 213504. Its totient is φ = 72864.

The previous prime is 133781. The next prime is 133801. The reversal of 133791 is 197331.

133791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (133781) and next prime (133801).

It is not a de Polignac number, because 133791 - 2⁹ = 133279 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (13344).

2¹³³⁷⁹¹ is an apocalyptic number.

133791 is a deficient number, since it is larger than the sum of its proper divisors (79713).

133791 is a wasteful number, since it uses less digits than its factorization.

133791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310.

The product of its digits is 567, while the sum is 24.

The square root of 133791 is about 365.7745207091. The cubic root of 133791 is about 51.1456811215.

The spelling of 133791 in words is "one hundred thirty-three thousand, seven hundred ninety-one".