12399199 has 2 divisors, whose sum is σ = 12399200. Its totient is φ = 12399198.

The previous prime is 12399197. The next prime is 12399251. The reversal of 12399199 is 99199321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12399199 - 2¹ = 12399197 is a prime.

Together with 12399197, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12399193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6199599 + 6199600.

It is an arithmetic number, because the mean of its divisors is an integer number (6199600).

Almost surely, 2^12399199 is an apocalyptic number.

12399199 is a deficient number, since it is larger than the sum of its proper divisors (1).

12399199 is an equidigital number, since it uses as much as digits as its factorization.

12399199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39366, while the sum is 43.

The square root of 12399199 is about 3521.2496361377. The cubic root of 12399199 is about 231.4539215124.

The spelling of 12399199 in words is "twelve million, three hundred ninety-nine thousand, one hundred ninety-nine".