1128220897 has 2 divisors, whose sum is σ = 1128220898. Its totient is φ = 1128220896.

The previous prime is 1128220859. The next prime is 1128220927. The reversal of 1128220897 is 7980228211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614246656 + 513974241 = 24784^2 + 22671^2 .

It is an emirp because it is prime and its reverse (7980228211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1128220897 - 2¹¹ = 1128218849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1128220297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564110448 + 564110449.

It is an arithmetic number, because the mean of its divisors is an integer number (564110449).

Almost surely, 2^1128220897 is an apocalyptic number.

It is an amenable number.

1128220897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128220897 is an equidigital number, since it uses as much as digits as its factorization.

1128220897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1128220897 is about 33588.9996427402. Note that the first 3 decimals coincide. The cubic root of 1128220897 is about 1041.0335192402.

The spelling of 1128220897 in words is "one billion, one hundred twenty-eight million, two hundred twenty thousand, eight hundred ninety-seven".