10644509 has 2 divisors, whose sum is σ = 10644510. Its totient is φ = 10644508.

The previous prime is 10644451. The next prime is 10644511. The reversal of 10644509 is 90544601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10582009 + 62500 = 3253^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 10644509 - 2²⁰ = 9595933 is a prime.

It is a super-2 number, since 2×10644509² = 226611143702162, which contains 22 as substring.

Together with 10644511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10644559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5322254 + 5322255.

It is an arithmetic number, because the mean of its divisors is an integer number (5322255).

Almost surely, 2^10644509 is an apocalyptic number.

It is an amenable number.

10644509 is a deficient number, since it is larger than the sum of its proper divisors (1).

10644509 is an equidigital number, since it uses as much as digits as its factorization.

10644509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 10644509 is about 3262.5923741712. The cubic root of 10644509 is about 219.9759546723.

The spelling of 10644509 in words is "ten million, six hundred forty-four thousand, five hundred nine".