1220232289 has 2 divisors, whose sum is σ = 1220232290. Its totient is φ = 1220232288.

The previous prime is 1220232281. The next prime is 1220232311. The reversal of 1220232289 is 9822320221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948147264 + 272085025 = 30792^2 + 16495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220232289 - 2³ = 1220232281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220232289.

It is not a weakly prime, because it can be changed into another prime (1220232281) 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, 610116144 + 610116145.

It is an arithmetic number, because the mean of its divisors is an integer number (610116145).

Almost surely, 2^1220232289 is an apocalyptic number.

It is an amenable number.

1220232289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220232289 is an equidigital number, since it uses as much as digits as its factorization.

1220232289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1220232289 is about 34931.8234422425. The cubic root of 1220232289 is about 1068.5975421574.

The spelling of 1220232289 in words is "one billion, two hundred twenty million, two hundred thirty-two thousand, two hundred eighty-nine".