1127982209 has 2 divisors, whose sum is σ = 1127982210. Its totient is φ = 1127982208.

The previous prime is 1127982197. The next prime is 1127982211. The reversal of 1127982209 is 9022897211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 779973184 + 348009025 = 27928^2 + 18655^2 .

It is a cyclic number.

It is not a de Polignac number, because 1127982209 - 2²⁴ = 1111204993 is a prime.

Together with 1127982211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1127982809) 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, 563991104 + 563991105.

It is an arithmetic number, because the mean of its divisors is an integer number (563991105).

Almost surely, 2^1127982209 is an apocalyptic number.

It is an amenable number.

1127982209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1127982209 is an equidigital number, since it uses as much as digits as its factorization.

1127982209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1127982209 is about 33585.4463867908. The cubic root of 1127982209 is about 1040.9600998905.

The spelling of 1127982209 in words is "one billion, one hundred twenty-seven million, nine hundred eighty-two thousand, two hundred nine".