22479209 has 2 divisors, whose sum is σ = 22479210. Its totient is φ = 22479208.

The previous prime is 22479199. The next prime is 22479217. The reversal of 22479209 is 90297422.

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., 21949225 + 529984 = 4685^2 + 728^2 .

It is a cyclic number.

It is not a de Polignac number, because 22479209 - 2¹² = 22475113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22479269) 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, 11239604 + 11239605.

It is an arithmetic number, because the mean of its divisors is an integer number (11239605).

Almost surely, 2^22479209 is an apocalyptic number.

It is an amenable number.

22479209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22479209 is an equidigital number, since it uses as much as digits as its factorization.

22479209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 22479209 is about 4741.2244199152. The cubic root of 22479209 is about 282.2238259554.

The spelling of 22479209 in words is "twenty-two million, four hundred seventy-nine thousand, two hundred nine".