1129722689 has 2 divisors, whose sum is σ = 1129722690. Its totient is φ = 1129722688.

The previous prime is 1129722661. The next prime is 1129722721. The reversal of 1129722689 is 9862279211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 676884289 + 452838400 = 26017^2 + 21280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129722689 - 2¹² = 1129718593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1129722089) 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, 564861344 + 564861345.

It is an arithmetic number, because the mean of its divisors is an integer number (564861345).

Almost surely, 2^1129722689 is an apocalyptic number.

It is an amenable number.

1129722689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129722689 is an equidigital number, since it uses as much as digits as its factorization.

1129722689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 1129722689 is about 33611.3476224920. The cubic root of 1129722689 is about 1041.4952262907.

The spelling of 1129722689 in words is "one billion, one hundred twenty-nine million, seven hundred twenty-two thousand, six hundred eighty-nine".