100010209 has 4 divisors (see below), whose sum is σ = 107703316. Its totient is φ = 92317104.

The previous prime is 100010203. The next prime is 100010227. The reversal of 100010209 is 902010001.

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 47128225 + 52881984 = 6865^2 + 7272^2 .

It is a cyclic number.

It is not a de Polignac number, because 100010209 - 2⁵ = 100010177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 7693093 = 100010209 / (1 + 0 + 0 + 0 + 1 + 0 + 2 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100010203) 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 3 ways as a sum of consecutive naturals, for example, 3846534 + ... + 3846559.

It is an arithmetic number, because the mean of its divisors is an integer number (26925829).

Almost surely, 2^100010209 is an apocalyptic number.

It is an amenable number.

100010209 is a deficient number, since it is larger than the sum of its proper divisors (7693107).

100010209 is an equidigital number, since it uses as much as digits as its factorization.

100010209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7693106.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 100010209 is about 10000.5104369727. The cubic root of 100010209 is about 464.1746781506.

The spelling of 100010209 in words is "one hundred million, ten thousand, two hundred nine".