12399367 has 4 divisors (see below), whose sum is σ = 12408616. Its totient is φ = 12390120.

The previous prime is 12399347. The next prime is 12399371. The reversal of 12399367 is 76399321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 76399321 = 3529 ⋅21649.

It is a cyclic number.

It is not a de Polignac number, because 12399367 - 2¹⁹ = 11875079 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 (12399347) 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 3 ways as a sum of consecutive naturals, for example, 2184 + ... + 5437.

It is an arithmetic number, because the mean of its divisors is an integer number (3102154).

Almost surely, 2^12399367 is an apocalyptic number.

12399367 is a deficient number, since it is larger than the sum of its proper divisors (9249).

12399367 is an equidigital number, since it uses as much as digits as its factorization.

12399367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9248.

The product of its digits is 61236, while the sum is 40.

The square root of 12399367 is about 3521.2734912244. The cubic root of 12399367 is about 231.4549668510.

The spelling of 12399367 in words is "twelve million, three hundred ninety-nine thousand, three hundred sixty-seven".