22408709 has 2 divisors, whose sum is σ = 22408710. Its totient is φ = 22408708.

The previous prime is 22408681. The next prime is 22408747. The reversal of 22408709 is 90780422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20052484 + 2356225 = 4478^2 + 1535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22408709 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22408109) 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 as a sum of consecutive naturals, namely, 11204354 + 11204355.

It is an arithmetic number, because the mean of its divisors is an integer number (11204355).

Almost surely, 2^22408709 is an apocalyptic number.

It is an amenable number.

22408709 is a deficient number, since it is larger than the sum of its proper divisors (1).

22408709 is an equidigital number, since it uses as much as digits as its factorization.

22408709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 22408709 is about 4733.7837931194. The cubic root of 22408709 is about 281.9284772423.

The spelling of 22408709 in words is "twenty-two million, four hundred eight thousand, seven hundred nine".