1122397789 has 2 divisors, whose sum is σ = 1122397790. Its totient is φ = 1122397788.

The previous prime is 1122397781. The next prime is 1122397799. The reversal of 1122397789 is 9877932211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717704100 + 404693689 = 26790^2 + 20117^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122397789 - 2³ = 1122397781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122397781) 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, 561198894 + 561198895.

It is an arithmetic number, because the mean of its divisors is an integer number (561198895).

Almost surely, 2^1122397789 is an apocalyptic number.

It is an amenable number.

1122397789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122397789 is an equidigital number, since it uses as much as digits as its factorization.

1122397789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 49.

The square root of 1122397789 is about 33502.2057333543. The cubic root of 1122397789 is about 1039.2393936302.

The spelling of 1122397789 in words is "one billion, one hundred twenty-two million, three hundred ninety-seven thousand, seven hundred eighty-nine".