100002209 has 4 divisors (see below), whose sum is σ = 100022916. Its totient is φ = 99981504.

The previous prime is 100002181. The next prime is 100002223. The reversal of 100002209 is 902200001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902200001 = 23 ⋅39226087.

It can be written as a sum of positive squares in 2 ways, for example, as 62853184 + 37149025 = 7928^2 + 6095^2 .

It is a cyclic number.

It is not a de Polignac number, because 100002209 - 2²⁰ = 98953633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100002193 and 100002202.

It is not an unprimeable number, because it can be changed into a prime (100002289) 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, 1157 + ... + 14189.

It is an arithmetic number, because the mean of its divisors is an integer number (25005729).

Almost surely, 2^100002209 is an apocalyptic number.

It is an amenable number.

100002209 is a deficient number, since it is larger than the sum of its proper divisors (20707).

100002209 is an equidigital number, since it uses as much as digits as its factorization.

100002209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20706.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 100002209 is about 10000.1104493900. The cubic root of 100002209 is about 464.1623010927.

It can be divided in two parts, 10000 and 2209, that multiplied together give a square (22090000 = 4700²).

The spelling of 100002209 in words is "one hundred million, two thousand, two hundred nine".