133449 has 4 divisors (see below), whose sum is σ = 177936. Its totient is φ = 88964.

The previous prime is 133447. The next prime is 133451. The reversal of 133449 is 944331.

133449 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 944331 = 3 ⋅314777.

It is an interprime number because it is at equal distance from previous prime (133447) and next prime (133451).

It is a cyclic number.

It is not a de Polignac number, because 133449 - 2¹ = 133447 is a prime.

It is a D-number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (133447) 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, 22239 + ... + 22244.

It is an arithmetic number, because the mean of its divisors is an integer number (44484).

2¹³³⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

133449 is a deficient number, since it is larger than the sum of its proper divisors (44487).

133449 is an equidigital number, since it uses as much as digits as its factorization.

133449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44486.

The product of its digits is 1296, while the sum is 24.

The square root of 133449 is about 365.3067204419. The cubic root of 133449 is about 51.1020639661.

The spelling of 133449 in words is "one hundred thirty-three thousand, four hundred forty-nine".