1096905809 has 2 divisors, whose sum is σ = 1096905810. Its totient is φ = 1096905808.

The previous prime is 1096905769. The next prime is 1096905847. The reversal of 1096905809 is 9085096901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1077677584 + 19228225 = 32828^2 + 4385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1096905809 - 2¹⁶ = 1096840273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1096905109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548452904 + 548452905.

It is an arithmetic number, because the mean of its divisors is an integer number (548452905).

Almost surely, 2^1096905809 is an apocalyptic number.

It is an amenable number.

1096905809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1096905809 is an equidigital number, since it uses as much as digits as its factorization.

1096905809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 1096905809 is about 33119.5683697720. The cubic root of 1096905809 is about 1031.3113059410.

The spelling of 1096905809 in words is "one billion, ninety-six million, nine hundred five thousand, eight hundred nine".