1126789749 has 12 divisors (see below), whose sum is σ = 1671574476. Its totient is φ = 730890432.

The previous prime is 1126789747. The next prime is 1126789753. The reversal of 1126789749 is 9479876211.

It can be written as a sum of positive squares in 2 ways, for example, as 823403025 + 303386724 = 28695^2 + 17418^2 .

It is not a de Polignac number, because 1126789749 - 2¹ = 1126789747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1126789695 and 1126789704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1126789747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1691544 + ... + 1692209.

It is an arithmetic number, because the mean of its divisors is an integer number (139297873).

Almost surely, 2^1126789749 is an apocalyptic number.

It is an amenable number.

1126789749 is a deficient number, since it is larger than the sum of its proper divisors (544784727).

1126789749 is a wasteful number, since it uses less digits than its factorization.

1126789749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383796 (or 3383793 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 1126789749 is about 33567.6890625494. The cubic root of 1126789749 is about 1040.5931493755.

The spelling of 1126789749 in words is "one billion, one hundred twenty-six million, seven hundred eighty-nine thousand, seven hundred forty-nine".