1223498209 has 2 divisors, whose sum is σ = 1223498210. Its totient is φ = 1223498208.

The previous prime is 1223498191. The next prime is 1223498231. The reversal of 1223498209 is 9028943221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 939238609 + 284259600 = 30647^2 + 16860^2 .

It is an emirp because it is prime and its reverse (9028943221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223498209 - 2¹¹ = 1223496161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223498239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611749104 + 611749105.

It is an arithmetic number, because the mean of its divisors is an integer number (611749105).

Almost surely, 2^1223498209 is an apocalyptic number.

It is an amenable number.

1223498209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223498209 is an equidigital number, since it uses as much as digits as its factorization.

1223498209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1223498209 is about 34978.5392633826. The cubic root of 1223498209 is about 1069.5500507213.

The spelling of 1223498209 in words is "one billion, two hundred twenty-three million, four hundred ninety-eight thousand, two hundred nine".