1112112809 has 2 divisors, whose sum is σ = 1112112810. Its totient is φ = 1112112808.

The previous prime is 1112112763. The next prime is 1112112821. The reversal of 1112112809 is 9082112111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1110755584 + 1357225 = 33328^2 + 1165^2 .

It is an emirp because it is prime and its reverse (9082112111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112112809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1112112829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556056404 + 556056405.

It is an arithmetic number, because the mean of its divisors is an integer number (556056405).

Almost surely, 2^1112112809 is an apocalyptic number.

It is an amenable number.

1112112809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112112809 is an equidigital number, since it uses as much as digits as its factorization.

1112112809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 26.

The square root of 1112112809 is about 33348.3554167218. The cubic root of 1112112809 is about 1036.0553259885.

The spelling of 1112112809 in words is "one billion, one hundred twelve million, one hundred twelve thousand, eight hundred nine".