10644209 has 2 divisors, whose sum is σ = 10644210. Its totient is φ = 10644208.

The previous prime is 10644181. The next prime is 10644211. The reversal of 10644209 is 90244601.

10644209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5536609 + 5107600 = 2353^2 + 2260^2 .

It is an emirp because it is prime and its reverse (90244601) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10644209 is a prime.

It is a super-2 number, since 2×10644209² = 226598370471362, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 10644211, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10644229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5322104 + 5322105.

It is an arithmetic number, because the mean of its divisors is an integer number (5322105).

Almost surely, 2^10644209 is an apocalyptic number.

It is an amenable number.

10644209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10644209 is an equidigital number, since it uses as much as digits as its factorization.

10644209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 10644209 is about 3262.5463981375. The cubic root of 10644209 is about 219.9738880855.

The spelling of 10644209 in words is "ten million, six hundred forty-four thousand, two hundred nine".