1109199149 has 2 divisors, whose sum is σ = 1109199150. Its totient is φ = 1109199148.

The previous prime is 1109199131. The next prime is 1109199181. The reversal of 1109199149 is 9419919011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1105562500 + 3636649 = 33250^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109199149 - 2²⁰ = 1108150573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109199109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554599574 + 554599575.

It is an arithmetic number, because the mean of its divisors is an integer number (554599575).

Almost surely, 2^1109199149 is an apocalyptic number.

It is an amenable number.

1109199149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109199149 is an equidigital number, since it uses as much as digits as its factorization.

1109199149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 44.

The square root of 1109199149 is about 33304.6415533931. The cubic root of 1109199149 is about 1035.1497364791.

The spelling of 1109199149 in words is "one billion, one hundred nine million, one hundred ninety-nine thousand, one hundred forty-nine".