1131123289 has 2 divisors, whose sum is σ = 1131123290. Its totient is φ = 1131123288.

The previous prime is 1131123283. The next prime is 1131123311. The reversal of 1131123289 is 9823211311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1129497664 + 1625625 = 33608^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131123289 - 2⁹ = 1131122777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131123289.

It is not a weakly prime, because it can be changed into another prime (1131123283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565561644 + 565561645.

It is an arithmetic number, because the mean of its divisors is an integer number (565561645).

Almost surely, 2^1131123289 is an apocalyptic number.

It is an amenable number.

1131123289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131123289 is an equidigital number, since it uses as much as digits as its factorization.

1131123289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 1131123289 is about 33632.1763940427. The cubic root of 1131123289 is about 1041.9254545276.

The spelling of 1131123289 in words is "one billion, one hundred thirty-one million, one hundred twenty-three thousand, two hundred eighty-nine".