1122785789 has 2 divisors, whose sum is σ = 1122785790. Its totient is φ = 1122785788.

The previous prime is 1122785777. The next prime is 1122785801. The reversal of 1122785789 is 9875872211.

It is a balanced prime because it is at equal distance from previous prime (1122785777) and next prime (1122785801).

It can be written as a sum of positive squares in only one way, i.e., 1056900100 + 65885689 = 32510^2 + 8117^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122785789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122785189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561392894 + 561392895.

It is an arithmetic number, because the mean of its divisors is an integer number (561392895).

Almost surely, 2^1122785789 is an apocalyptic number.

It is an amenable number.

1122785789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122785789 is an equidigital number, since it uses as much as digits as its factorization.

1122785789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 50.

The square root of 1122785789 is about 33507.9958965021. The cubic root of 1122785789 is about 1039.3591308672.

The spelling of 1122785789 in words is "one billion, one hundred twenty-two million, seven hundred eighty-five thousand, seven hundred eighty-nine".