133648985 has 8 divisors (see below), whose sum is σ = 169812936. Its totient is φ = 100629760.

The previous prime is 133648981. The next prime is 133648993. The reversal of 133648985 is 589846331.

It can be written as a sum of positive squares in 4 ways, for example, as 42198016 + 91450969 = 6496^2 + 9563^2 .

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

It is not a de Polignac number, because 133648985 - 2² = 133648981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133648981) 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 7 ways as a sum of consecutive naturals, for example, 786086 + ... + 786255.

It is an arithmetic number, because the mean of its divisors is an integer number (21226617).

Almost surely, 2^133648985 is an apocalyptic number.

It is an amenable number.

133648985 is a deficient number, since it is larger than the sum of its proper divisors (36163951).

133648985 is a wasteful number, since it uses less digits than its factorization.

133648985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572363.

The product of its digits is 622080, while the sum is 47.

The square root of 133648985 is about 11560.6654220248. The cubic root of 133648985 is about 511.2757819627.

The spelling of 133648985 in words is "one hundred thirty-three million, six hundred forty-eight thousand, nine hundred eighty-five".