22208609 has 2 divisors, whose sum is σ = 22208610. Its totient is φ = 22208608.

The previous prime is 22208573. The next prime is 22208611. The reversal of 22208609 is 90680222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14227984 + 7980625 = 3772^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 22208609 - 2¹² = 22204513 is a prime.

Together with 22208611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22208629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11104304 + 11104305.

It is an arithmetic number, because the mean of its divisors is an integer number (11104305).

Almost surely, 2^22208609 is an apocalyptic number.

It is an amenable number.

22208609 is a deficient number, since it is larger than the sum of its proper divisors (1).

22208609 is an equidigital number, since it uses as much as digits as its factorization.

22208609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 22208609 is about 4712.6010864490. The cubic root of 22208609 is about 281.0868008589.

The spelling of 22208609 in words is "twenty-two million, two hundred eight thousand, six hundred nine".