133493213 has 4 divisors (see below), whose sum is σ = 152563680. Its totient is φ = 114422748.

The previous prime is 133493209. The next prime is 133493233. The reversal of 133493213 is 312394331.

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: 312394331 = 491 ⋅636241.

It is a cyclic number.

It is not a de Polignac number, because 133493213 - 2² = 133493209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133493233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9535223 + ... + 9535236.

It is an arithmetic number, because the mean of its divisors is an integer number (38140920).

Almost surely, 2^133493213 is an apocalyptic number.

It is an amenable number.

133493213 is a deficient number, since it is larger than the sum of its proper divisors (19070467).

133493213 is an equidigital number, since it uses as much as digits as its factorization.

133493213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19070466.

The product of its digits is 5832, while the sum is 29.

The square root of 133493213 is about 11553.9263023442. The cubic root of 133493213 is about 511.0770688610.

The spelling of 133493213 in words is "one hundred thirty-three million, four hundred ninety-three thousand, two hundred thirteen".