133959 has 8 divisors (see below), whose sum is σ = 204160. Its totient is φ = 76536.

The previous prime is 133949. The next prime is 133963. The reversal of 133959 is 959331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133959 - 2⁷ = 133831 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 (133919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3169 + ... + 3210.

It is an arithmetic number, because the mean of its divisors is an integer number (25520).

2¹³³⁹⁵⁹ is an apocalyptic number.

133959 is a deficient number, since it is larger than the sum of its proper divisors (70201).

133959 is an equidigital number, since it uses as much as digits as its factorization.

133959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6389.

The product of its digits is 3645, while the sum is 30.

The square root of 133959 is about 366.0040983377. The cubic root of 133959 is about 51.1670798714.

The spelling of 133959 in words is "one hundred thirty-three thousand, nine hundred fifty-nine".