133840345 has 8 divisors (see below), whose sum is σ = 160670664. Its totient is φ = 107030784.

The previous prime is 133840279. The next prime is 133840367. The reversal of 133840345 is 543048331.

It can be written as a sum of positive squares in 4 ways, for example, as 16096144 + 117744201 = 4012^2 + 10851^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 133840345 - 2⁹ = 133839833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21307 + ... + 26863.

It is an arithmetic number, because the mean of its divisors is an integer number (20083833).

Almost surely, 2^133840345 is an apocalyptic number.

It is an amenable number.

133840345 is a deficient number, since it is larger than the sum of its proper divisors (26830319).

133840345 is an equidigital number, since it uses as much as digits as its factorization.

133840345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10379.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 133840345 is about 11568.9388018089. The cubic root of 133840345 is about 511.5196822455.

Adding to 133840345 its reverse (543048331), we get a palindrome (676888676).

The spelling of 133840345 in words is "one hundred thirty-three million, eight hundred forty thousand, three hundred forty-five".