11665943 has 16 divisors (see below), whose sum is σ = 12777600. Its totient is φ = 10614240.

The previous prime is 11665937. The next prime is 11665963. The reversal of 11665943 is 34956611.

It is a cyclic number.

It is not a de Polignac number, because 11665943 - 2⁶ = 11665879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88988 + ... + 89118.

It is an arithmetic number, because the mean of its divisors is an integer number (798600).

Almost surely, 2^11665943 is an apocalyptic number.

11665943 is a deficient number, since it is larger than the sum of its proper divisors (1111657).

11665943 is a wasteful number, since it uses less digits than its factorization.

11665943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302.

The product of its digits is 19440, while the sum is 35.

The square root of 11665943 is about 3415.5443197242. The cubic root of 11665943 is about 226.7983810113.

The spelling of 11665943 in words is "eleven million, six hundred sixty-five thousand, nine hundred forty-three".