1118128393 has 2 divisors, whose sum is σ = 1118128394. Its totient is φ = 1118128392.

The previous prime is 1118128391. The next prime is 1118128399. The reversal of 1118128393 is 3938218111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1071383824 + 46744569 = 32732^2 + 6837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118128393 - 2¹ = 1118128391 is a prime.

It is a super-2 number, since 2×1118128393² = 2500422206465524898, which contains 22 as substring.

Together with 1118128391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1118128391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559064196 + 559064197.

It is an arithmetic number, because the mean of its divisors is an integer number (559064197).

Almost surely, 2^1118128393 is an apocalyptic number.

It is an amenable number.

1118128393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118128393 is an equidigital number, since it uses as much as digits as its factorization.

1118128393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 37.

The square root of 1118128393 is about 33438.4268918261. The cubic root of 1118128393 is about 1037.9200271149.

The spelling of 1118128393 in words is "one billion, one hundred eighteen million, one hundred twenty-eight thousand, three hundred ninety-three".