11939966 has 16 divisors (see below), whose sum is σ = 18252000. Its totient is φ = 5857248.

The previous prime is 11939959. The next prime is 11940017. The reversal of 11939966 is 66993911.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30500 + ... + 30888.

It is an arithmetic number, because the mean of its divisors is an integer number (1140750).

Almost surely, 2^11939966 is an apocalyptic number.

11939966 is a deficient number, since it is larger than the sum of its proper divisors (6312034).

11939966 is a wasteful number, since it uses less digits than its factorization.

11939966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643.

The product of its digits is 78732, while the sum is 44.

The square root of 11939966 is about 3455.4255888385. The cubic root of 11939966 is about 228.5604224239.

The spelling of 11939966 in words is "eleven million, nine hundred thirty-nine thousand, nine hundred sixty-six".