133333441 has 4 divisors (see below), whose sum is σ = 134939952. Its totient is φ = 131726932.

The previous prime is 133333439. The next prime is 133333457. The reversal of 133333441 is 144333331.

It is a happy number.

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: 144333331 = 109 ⋅1324159.

It is a cyclic number.

It is not a de Polignac number, because 133333441 - 2¹ = 133333439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133333141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803131 + ... + 803296.

It is an arithmetic number, because the mean of its divisors is an integer number (33734988).

Almost surely, 2^133333441 is an apocalyptic number.

It is an amenable number.

133333441 is a deficient number, since it is larger than the sum of its proper divisors (1606511).

133333441 is an equidigital number, since it uses as much as digits as its factorization.

133333441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606510.

The product of its digits is 3888, while the sum is 25.

The square root of 133333441 is about 11547.0100458950. The cubic root of 133333441 is about 510.8730924390.

Adding to 133333441 its reverse (144333331), we get a palindrome (277666772).

The spelling of 133333441 in words is "one hundred thirty-three million, three hundred thirty-three thousand, four hundred forty-one".