1118128399 has 2 divisors, whose sum is σ = 1118128400. Its totient is φ = 1118128398.

The previous prime is 1118128393. The next prime is 1118128477. The reversal of 1118128399 is 9938218111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1118128399 - 2³ = 1118128391 is a prime.

It is a super-2 number, since 2×1118128399² = 2500422233300606402, which contains 22 as substring.

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559064199 + 559064200.

It is an arithmetic number, because the mean of its divisors is an integer number (559064200).

Almost surely, 2^1118128399 is an apocalyptic number.

1118128399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118128399 is an equidigital number, since it uses as much as digits as its factorization.

1118128399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 43.

The square root of 1118128399 is about 33438.4269815433. The cubic root of 1118128399 is about 1037.9200289714.

The spelling of 1118128399 in words is "one billion, one hundred eighteen million, one hundred twenty-eight thousand, three hundred ninety-nine".