11866939 has 16 divisors (see below), whose sum is σ = 13911040. Its totient is φ = 9914400.

The previous prime is 11866913. The next prime is 11866949. The reversal of 11866939 is 93966811.

It is a cyclic number.

It is not a de Polignac number, because 11866939 - 2¹³ = 11858747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11866895 and 11866904.

It is not an unprimeable number, because it can be changed into a prime (11866949) 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 in 15 ways as a sum of consecutive naturals, for example, 78514 + ... + 78664.

It is an arithmetic number, because the mean of its divisors is an integer number (869440).

Almost surely, 2^11866939 is an apocalyptic number.

11866939 is a deficient number, since it is larger than the sum of its proper divisors (2044101).

11866939 is a wasteful number, since it uses less digits than its factorization.

11866939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370.

The product of its digits is 69984, while the sum is 43.

The square root of 11866939 is about 3444.8423766553. The cubic root of 11866939 is about 228.0934968445.

The spelling of 11866939 in words is "eleven million, eight hundred sixty-six thousand, nine hundred thirty-nine".