1129085789 has 6 divisors (see below), whose sum is σ = 1222619706. Its totient is φ = 1042232880.

The previous prime is 1129085761. The next prime is 1129085851. The reversal of 1129085789 is 9875809211.

It can be written as a sum of positive squares in 3 ways, for example, as 4020025 + 1125065764 = 2005^2 + 33542^2 .

It is not a de Polignac number, because 1129085789 - 2⁸ = 1129085533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129085389) 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 in 5 ways as a sum of consecutive naturals, for example, 3340322 + ... + 3340659.

It is an arithmetic number, because the mean of its divisors is an integer number (203769951).

Almost surely, 2^1129085789 is an apocalyptic number.

It is an amenable number.

1129085789 is a deficient number, since it is larger than the sum of its proper divisors (93533917).

1129085789 is an equidigital number, since it uses as much as digits as its factorization.

1129085789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6681007 (or 6680994 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 50.

The square root of 1129085789 is about 33601.8718079812. The cubic root of 1129085789 is about 1041.2994694000.

It can be divided in two parts, 11290 and 85789, that added together give a palindrome (97079).

The spelling of 1129085789 in words is "one billion, one hundred twenty-nine million, eighty-five thousand, seven hundred eighty-nine".