1183128449 has 2 divisors, whose sum is σ = 1183128450. Its totient is φ = 1183128448.

The previous prime is 1183128421. The next prime is 1183128473. The reversal of 1183128449 is 9448213811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1182878449 + 250000 = 34393^2 + 500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1183128449 is a prime.

It is a super-3 number, since 3×1183128449³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1183128649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591564224 + 591564225.

It is an arithmetic number, because the mean of its divisors is an integer number (591564225).

Almost surely, 2^1183128449 is an apocalyptic number.

It is an amenable number.

1183128449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1183128449 is an equidigital number, since it uses as much as digits as its factorization.

1183128449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 41.

The square root of 1183128449 is about 34396.6342684862. The cubic root of 1183128449 is about 1057.6548513055.

The spelling of 1183128449 in words is "one billion, one hundred eighty-three million, one hundred twenty-eight thousand, four hundred forty-nine".