133606643 has 8 divisors (see below), whose sum is σ = 135821568. Its totient is φ = 131398344.

The previous prime is 133606631. The next prime is 133606663. The reversal of 133606643 is 346606331.

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 133606643 - 2⁶ = 133606579 is a prime.

It is a super-3 number, since 3×133606643³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133606663) by changing a digit.

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, 53930 + ... + 56352.

It is an arithmetic number, because the mean of its divisors is an integer number (16977696).

Almost surely, 2^133606643 is an apocalyptic number.

133606643 is a deficient number, since it is larger than the sum of its proper divisors (2214925).

133606643 is an equidigital number, since it uses as much as digits as its factorization.

133606643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 133606643 is about 11558.8339809861. The cubic root of 133606643 is about 511.2217829848.

The spelling of 133606643 in words is "one hundred thirty-three million, six hundred six thousand, six hundred forty-three".