11388109 has 2 divisors, whose sum is σ = 11388110. Its totient is φ = 11388108.

The previous prime is 11388103. The next prime is 11388127. The reversal of 11388109 is 90188311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 299209 = 3330^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 11388109 - 2¹¹ = 11386061 is a prime.

It is a super-3 number, since 3×11388109³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11388103) 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, 5694054 + 5694055.

It is an arithmetic number, because the mean of its divisors is an integer number (5694055).

Almost surely, 2^11388109 is an apocalyptic number.

It is an amenable number.

11388109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11388109 is an equidigital number, since it uses as much as digits as its factorization.

11388109 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 31.

The square root of 11388109 is about 3374.6272386739. The cubic root of 11388109 is about 224.9834325250.

The spelling of 11388109 in words is "eleven million, three hundred eighty-eight thousand, one hundred nine".