1121945849 has 2 divisors, whose sum is σ = 1121945850. Its totient is φ = 1121945848.

The previous prime is 1121945827. The next prime is 1121945861. The reversal of 1121945849 is 9485491211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 699232249 + 422713600 = 26443^2 + 20560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121945849 - 2²⁴ = 1105168633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121945879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560972924 + 560972925.

It is an arithmetic number, because the mean of its divisors is an integer number (560972925).

Almost surely, 2^1121945849 is an apocalyptic number.

It is an amenable number.

1121945849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121945849 is an equidigital number, since it uses as much as digits as its factorization.

1121945849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 1121945849 is about 33495.4601252170. The cubic root of 1121945849 is about 1039.0998896417.

The spelling of 1121945849 in words is "one billion, one hundred twenty-one million, nine hundred forty-five thousand, eight hundred forty-nine".