1108903409 has 2 divisors, whose sum is σ = 1108903410. Its totient is φ = 1108903408.

The previous prime is 1108903339. The next prime is 1108903427. The reversal of 1108903409 is 9043098011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 560032225 + 548871184 = 23665^2 + 23428^2 .

It is an emirp because it is prime and its reverse (9043098011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1108903409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1108903429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554451704 + 554451705.

It is an arithmetic number, because the mean of its divisors is an integer number (554451705).

Almost surely, 2^1108903409 is an apocalyptic number.

It is an amenable number.

1108903409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1108903409 is an equidigital number, since it uses as much as digits as its factorization.

1108903409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1108903409 is about 33300.2013357277. The cubic root of 1108903409 is about 1035.0577294380.

The spelling of 1108903409 in words is "one billion, one hundred eight million, nine hundred three thousand, four hundred nine".