133312309 has 4 divisors (see below), whose sum is σ = 143567116. Its totient is φ = 123057504.

The previous prime is 133312297. The next prime is 133312337. The reversal of 133312309 is 903213331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37859409 + 95452900 = 6153^2 + 9770^2 .

It is a cyclic number.

It is not a de Polignac number, because 133312309 - 2¹³ = 133304117 is a prime.

It is a super-2 number, since 2×133312309² = 35544343461822962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133312609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5127384 + ... + 5127409.

It is an arithmetic number, because the mean of its divisors is an integer number (35891779).

Almost surely, 2^133312309 is an apocalyptic number.

It is an amenable number.

133312309 is a deficient number, since it is larger than the sum of its proper divisors (10254807).

133312309 is a wasteful number, since it uses less digits than its factorization.

133312309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10254806.

The product of its (nonzero) digits is 1458, while the sum is 25.

The square root of 133312309 is about 11546.0949675637. The cubic root of 133312309 is about 510.8461016093.

The spelling of 133312309 in words is "one hundred thirty-three million, three hundred twelve thousand, three hundred nine".