133220009 has 4 divisors (see below), whose sum is σ = 143467716. Its totient is φ = 122972304.

The previous prime is 133219993. The next prime is 133220011. The reversal of 133220009 is 900022331.

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 14845609 + 118374400 = 3853^2 + 10880^2 .

It is not a de Polignac number, because 133220009 - 2⁴ = 133219993 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 (133220089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5123834 + ... + 5123859.

It is an arithmetic number, because the mean of its divisors is an integer number (35866929).

Almost surely, 2^133220009 is an apocalyptic number.

It is an amenable number.

133220009 is a deficient number, since it is larger than the sum of its proper divisors (10247707).

133220009 is a wasteful number, since it uses less digits than its factorization.

133220009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10247706.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 133220009 is about 11542.0972530992. The cubic root of 133220009 is about 510.7281780618.

The spelling of 133220009 in words is "one hundred thirty-three million, two hundred twenty thousand, nine".