11866109 has 2 divisors, whose sum is σ = 11866110. Its totient is φ = 11866108.

The previous prime is 11866081. The next prime is 11866157. The reversal of 11866109 is 90166811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11710084 + 156025 = 3422^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 11866109 - 2⁸ = 11865853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11866199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5933054 + 5933055.

It is an arithmetic number, because the mean of its divisors is an integer number (5933055).

Almost surely, 2^11866109 is an apocalyptic number.

It is an amenable number.

11866109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11866109 is an equidigital number, since it uses as much as digits as its factorization.

11866109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 11866109 is about 3444.7219045955. The cubic root of 11866109 is about 228.0881789323.

The spelling of 11866109 in words is "eleven million, eight hundred sixty-six thousand, one hundred nine".