133333393 has 4 divisors (see below), whose sum is σ = 140350960. Its totient is φ = 126315828.

The previous prime is 133333391. The next prime is 133333439. The reversal of 133333393 is 393333331.

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: 393333331 = 8291 ⋅47441.

It is a cyclic number.

It is not a de Polignac number, because 133333393 - 2¹ = 133333391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133333391) 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, 3508755 + ... + 3508792.

It is an arithmetic number, because the mean of its divisors is an integer number (35087740).

Almost surely, 2^133333393 is an apocalyptic number.

It is an amenable number.

133333393 is a deficient number, since it is larger than the sum of its proper divisors (7017567).

133333393 is an equidigital number, since it uses as much as digits as its factorization.

133333393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7017566.

The product of its digits is 19683, while the sum is 31.

The square root of 133333393 is about 11547.0079674347. The cubic root of 133333393 is about 510.8730311342.

The spelling of 133333393 in words is "one hundred thirty-three million, three hundred thirty-three thousand, three hundred ninety-three".