133369 has 4 divisors (see below), whose sum is σ = 134244. Its totient is φ = 132496.

The previous prime is 133351. The next prime is 133379. The reversal of 133369 is 963331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 131769 + 1600 = 363^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 133369 - 2⁵ = 133337 is a prime.

It is a super-2 number, since 2×133369² = 35574580322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

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 (133319) 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, 142 + ... + 535.

It is an arithmetic number, because the mean of its divisors is an integer number (33561).

2¹³³³⁶⁹ is an apocalyptic number.

It is an amenable number.

133369 is a deficient number, since it is larger than the sum of its proper divisors (875).

133369 is an equidigital number, since it uses as much as digits as its factorization.

133369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874.

The product of its digits is 1458, while the sum is 25.

The square root of 133369 is about 365.1972069992. The cubic root of 133369 is about 51.0918503706.

The spelling of 133369 in words is "one hundred thirty-three thousand, three hundred sixty-nine".