1118383897 has 2 divisors, whose sum is σ = 1118383898. Its totient is φ = 1118383896.

The previous prime is 1118383859. The next prime is 1118383921. The reversal of 1118383897 is 7983838111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1065108496 + 53275401 = 32636^2 + 7299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118383897 is a prime.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1118383897.

It is not a weakly prime, because it can be changed into another prime (1118383397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559191948 + 559191949.

It is an arithmetic number, because the mean of its divisors is an integer number (559191949).

Almost surely, 2^1118383897 is an apocalyptic number.

It is an amenable number.

1118383897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118383897 is an equidigital number, since it uses as much as digits as its factorization.

1118383897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 49.

The square root of 1118383897 is about 33442.2471882498. The cubic root of 1118383897 is about 1037.9990796111. Note that the first 3 decimals are identical.

The spelling of 1118383897 in words is "one billion, one hundred eighteen million, three hundred eighty-three thousand, eight hundred ninety-seven".