1223942089 has 2 divisors, whose sum is σ = 1223942090. Its totient is φ = 1223942088.

The previous prime is 1223942059. The next prime is 1223942101. The reversal of 1223942089 is 9802493221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 762036025 + 461906064 = 27605^2 + 21492^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223942089 - 2¹⁵ = 1223909321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223942059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611971044 + 611971045.

It is an arithmetic number, because the mean of its divisors is an integer number (611971045).

Almost surely, 2^1223942089 is an apocalyptic number.

It is an amenable number.

1223942089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223942089 is an equidigital number, since it uses as much as digits as its factorization.

1223942089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1223942089 is about 34984.8837214017. The cubic root of 1223942089 is about 1069.6793778349.

The spelling of 1223942089 in words is "one billion, two hundred twenty-three million, nine hundred forty-two thousand, eighty-nine".