133333399 has 4 divisors (see below), whose sum is σ = 133852464. Its totient is φ = 132814336.

The previous prime is 133333391. The next prime is 133333439. The reversal of 133333399 is 993333331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993333331 = 8539 ⋅116329.

It is a cyclic number.

It is not a de Polignac number, because 133333399 - 2³ = 133333391 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133333391) 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, 259147 + ... + 259660.

It is an arithmetic number, because the mean of its divisors is an integer number (33463116).

Almost surely, 2^133333399 is an apocalyptic number.

133333399 is a deficient number, since it is larger than the sum of its proper divisors (519065).

133333399 is an equidigital number, since it uses as much as digits as its factorization.

133333399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519064.

The product of its digits is 59049, while the sum is 37.

The square root of 133333399 is about 11547.0082272422. The cubic root of 133333399 is about 510.8730387973.

The spelling of 133333399 in words is "one hundred thirty-three million, three hundred thirty-three thousand, three hundred ninety-nine".