1129957709 has 2 divisors, whose sum is σ = 1129957710. Its totient is φ = 1129957708.

The previous prime is 1129957693. The next prime is 1129957757. The reversal of 1129957709 is 9077599211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768121225 + 361836484 = 27715^2 + 19022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129957709 - 2⁴ = 1129957693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1129957109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564978854 + 564978855.

It is an arithmetic number, because the mean of its divisors is an integer number (564978855).

Almost surely, 2^1129957709 is an apocalyptic number.

It is an amenable number.

1129957709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129957709 is an equidigital number, since it uses as much as digits as its factorization.

1129957709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 357210, while the sum is 50.

The square root of 1129957709 is about 33614.8435813704. The cubic root of 1129957709 is about 1041.5674431981.

The spelling of 1129957709 in words is "one billion, one hundred twenty-nine million, nine hundred fifty-seven thousand, seven hundred nine".