1118309 has 2 divisors, whose sum is σ = 1118310. Its totient is φ = 1118308.

The previous prime is 1118303. The next prime is 1118317. The reversal of 1118309 is 9038111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 494209 = 790^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118309 - 2¹² = 1114213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559154 + 559155.

It is an arithmetic number, because the mean of its divisors is an integer number (559155).

2^1118309 is an apocalyptic number.

It is an amenable number.

1118309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118309 is an equidigital number, since it uses as much as digits as its factorization.

1118309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1118309 is about 1057.5013002356. The cubic root of 1118309 is about 103.7975907856.

The spelling of 1118309 in words is "one million, one hundred eighteen thousand, three hundred nine".