1118938897 has 2 divisors, whose sum is σ = 1118938898. Its totient is φ = 1118938896.

The previous prime is 1118938889. The next prime is 1118938901. The reversal of 1118938897 is 7988398111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 886193361 + 232745536 = 29769^2 + 15256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118938897 - 2³ = 1118938889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1118138897) 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, 559469448 + 559469449.

It is an arithmetic number, because the mean of its divisors is an integer number (559469449).

Almost surely, 2^1118938897 is an apocalyptic number.

It is an amenable number.

1118938897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118938897 is an equidigital number, since it uses as much as digits as its factorization.

1118938897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 55.

The square root of 1118938897 is about 33450.5440463978. The cubic root of 1118938897 is about 1038.1707541800.

It can be divided in two parts, 11189 and 38897, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 1118938897 in words is "one billion, one hundred eighteen million, nine hundred thirty-eight thousand, eight hundred ninety-seven".