1109146681 has 2 divisors, whose sum is σ = 1109146682. Its totient is φ = 1109146680.

The previous prime is 1109146667. The next prime is 1109146721. The reversal of 1109146681 is 1866419011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913006656 + 196140025 = 30216^2 + 14005^2 .

It is an emirp because it is prime and its reverse (1866419011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1109146681 - 2⁷ = 1109146553 is a prime.

It is a super-4 number, since 4×1109146681⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1109146681.

It is not a weakly prime, because it can be changed into another prime (1109146651) 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, 554573340 + 554573341.

It is an arithmetic number, because the mean of its divisors is an integer number (554573341).

Almost surely, 2^1109146681 is an apocalyptic number.

It is an amenable number.

1109146681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109146681 is an equidigital number, since it uses as much as digits as its factorization.

1109146681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1109146681 is about 33303.8538460641. The cubic root of 1109146681 is about 1035.1334144649.

The spelling of 1109146681 in words is "one billion, one hundred nine million, one hundred forty-six thousand, six hundred eighty-one".