133306405 has 8 divisors (see below), whose sum is σ = 162221184. Its totient is φ = 105142800.

The previous prime is 133306403. The next prime is 133306423. The reversal of 133306405 is 504603331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133306405 - 2¹ = 133306403 is a prime.

It is a super-2 number, since 2×133306405² = 35541195228048050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133306405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133306403) 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 7 ways as a sum of consecutive naturals, for example, 187401 + ... + 188110.

It is an arithmetic number, because the mean of its divisors is an integer number (20277648).

Almost surely, 2^133306405 is an apocalyptic number.

It is an amenable number.

133306405 is a deficient number, since it is larger than the sum of its proper divisors (28914779).

133306405 is an equidigital number, since it uses as much as digits as its factorization.

133306405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375587.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 133306405 is about 11545.8392938755. The cubic root of 133306405 is about 510.8385602204.

Adding to 133306405 its reverse (504603331), we get a palindrome (637909736).

The spelling of 133306405 in words is "one hundred thirty-three million, three hundred six thousand, four hundred five".