12389966 has 4 divisors (see below), whose sum is σ = 18584952. Its totient is φ = 6194982.

The previous prime is 12389963. The next prime is 12389981. The reversal of 12389966 is 66998321.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×12389966² = 307022514962312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12389963) 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, 3097490 + ... + 3097493.

It is an arithmetic number, because the mean of its divisors is an integer number (4646238).

Almost surely, 2^12389966 is an apocalyptic number.

12389966 is a deficient number, since it is larger than the sum of its proper divisors (6194986).

12389966 is an equidigital number, since it uses as much as digits as its factorization.

12389966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6194985.

The product of its digits is 139968, while the sum is 44.

The square root of 12389966 is about 3519.9383517329. The cubic root of 12389966 is about 231.3964569209.

The spelling of 12389966 in words is "twelve million, three hundred eighty-nine thousand, nine hundred sixty-six".