12186993 has 16 divisors (see below), whose sum is σ = 19999616. Its totient is φ = 6428160.

The previous prime is 12186971. The next prime is 12186997. The reversal of 12186993 is 39968121.

It is not a de Polignac number, because 12186993 - 2⁸ = 12186737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (12186997) 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, 22048 + ... + 22593.

It is an arithmetic number, because the mean of its divisors is an integer number (1249976).

Almost surely, 2^12186993 is an apocalyptic number.

12186993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12186993 is a deficient number, since it is larger than the sum of its proper divisors (7812623).

12186993 is a wasteful number, since it uses less digits than its factorization.

12186993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44664.

The product of its digits is 23328, while the sum is 39.

The square root of 12186993 is about 3490.9873961388. The cubic root of 12186993 is about 230.1259108951.

The spelling of 12186993 in words is "twelve million, one hundred eighty-six thousand, nine hundred ninety-three".