133839 has 8 divisors (see below), whose sum is σ = 198320. Its totient is φ = 89208.

The previous prime is 133831. The next prime is 133843. The reversal of 133839 is 938331.

133839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 133839 - 2³ = 133831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4957 = 133839 / (1 + 3 + 3 + 8 + 3 + 9).

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133831) 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, 2452 + ... + 2505.

It is an arithmetic number, because the mean of its divisors is an integer number (24790).

2¹³³⁸³⁹ is an apocalyptic number.

133839 is a deficient number, since it is larger than the sum of its proper divisors (64481).

133839 is an equidigital number, since it uses as much as digits as its factorization.

133839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966 (or 4960 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 133839 is about 365.8401290181. The cubic root of 133839 is about 51.1517968770.

The spelling of 133839 in words is "one hundred thirty-three thousand, eight hundred thirty-nine".