1018109 has 2 divisors, whose sum is σ = 1018110. Its totient is φ = 1018108.

The previous prime is 1018097. The next prime is 1018123. The reversal of 1018109 is 9018101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1006009 + 12100 = 1003^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018109 - 2¹⁶ = 952573 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1018309) 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, 509054 + 509055.

It is an arithmetic number, because the mean of its divisors is an integer number (509055).

2^1018109 is an apocalyptic number.

It is an amenable number.

1018109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018109 is an equidigital number, since it uses as much as digits as its factorization.

1018109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1018109 is about 1009.0138750285. The cubic root of 1018109 is about 100.6000258225.

The spelling of 1018109 in words is "one million, eighteen thousand, one hundred nine".