1118301809 has 2 divisors, whose sum is σ = 1118301810. Its totient is φ = 1118301808.

The previous prime is 1118301763. The next prime is 1118301841. The reversal of 1118301809 is 9081038111.

It is an a-pointer prime, because the next prime (1118301841) can be obtained adding 1118301809 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 984390625 + 133911184 = 31375^2 + 11572^2 .

It is an emirp because it is prime and its reverse (9081038111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118301809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1118301889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559150904 + 559150905.

It is an arithmetic number, because the mean of its divisors is an integer number (559150905).

Almost surely, 2^1118301809 is an apocalyptic number.

It is an amenable number.

1118301809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118301809 is an equidigital number, since it uses as much as digits as its factorization.

1118301809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 32.

The square root of 1118301809 is about 33441.0198558597. The cubic root of 1118301809 is about 1037.9736830385.

The spelling of 1118301809 in words is "one billion, one hundred eighteen million, three hundred one thousand, eight hundred nine".