22003609 has 2 divisors, whose sum is σ = 22003610. Its totient is φ = 22003608.

The previous prime is 22003591. The next prime is 22003613. The reversal of 22003609 is 90630022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21418384 + 585225 = 4628^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 22003609 - 2⁷ = 22003481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22003609.

It is not a weakly prime, because it can be changed into another prime (22003649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001804 + 11001805.

It is an arithmetic number, because the mean of its divisors is an integer number (11001805).

Almost surely, 2^22003609 is an apocalyptic number.

It is an amenable number.

22003609 is a deficient number, since it is larger than the sum of its proper divisors (1).

22003609 is an equidigital number, since it uses as much as digits as its factorization.

22003609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 22003609 is about 4690.8004647395. The cubic root of 22003609 is about 280.2192542883.

The spelling of 22003609 in words is "twenty-two million, three thousand, six hundred nine".