1208430109 has 2 divisors, whose sum is σ = 1208430110. Its totient is φ = 1208430108.

The previous prime is 1208430089. The next prime is 1208430121. The reversal of 1208430109 is 9010348021.

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., 848265625 + 360164484 = 29125^2 + 18978^2 .

It is a cyclic number.

It is not a de Polignac number, because 1208430109 - 2⁹ = 1208429597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1208430149) 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, 604215054 + 604215055.

It is an arithmetic number, because the mean of its divisors is an integer number (604215055).

Almost surely, 2^1208430109 is an apocalyptic number.

It is an amenable number.

1208430109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208430109 is an equidigital number, since it uses as much as digits as its factorization.

1208430109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1208430109 is about 34762.4813412391. The cubic root of 1208430109 is about 1065.1411890078.

The spelling of 1208430109 in words is "one billion, two hundred eight million, four hundred thirty thousand, one hundred nine".