133911 has 6 divisors (see below), whose sum is σ = 193440. Its totient is φ = 89268.

The previous prime is 133877. The next prime is 133919. The reversal of 133911 is 119331.

It is not a de Polignac number, because 133911 - 2¹⁰ = 132887 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7431 + ... + 7448.

It is an arithmetic number, because the mean of its divisors is an integer number (32240).

2¹³³⁹¹¹ is an apocalyptic number.

133911 is a deficient number, since it is larger than the sum of its proper divisors (59529).

133911 is a wasteful number, since it uses less digits than its factorization.

133911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14885 (or 14882 counting only the distinct ones).

The product of its digits is 81, while the sum is 18.

The square root of 133911 is about 365.9385194264. The cubic root of 133911 is about 51.1609677693.

The spelling of 133911 in words is "one hundred thirty-three thousand, nine hundred eleven".