12399407 has 2 divisors, whose sum is σ = 12399408. Its totient is φ = 12399406.

The previous prime is 12399397. The next prime is 12399427. The reversal of 12399407 is 70499321.

It is a weak prime.

It is an emirp because it is prime and its reverse (70499321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12399407 - 2¹⁴ = 12383023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12399427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6199703 + 6199704.

It is an arithmetic number, because the mean of its divisors is an integer number (6199704).

Almost surely, 2^12399407 is an apocalyptic number.

12399407 is a deficient number, since it is larger than the sum of its proper divisors (1).

12399407 is an equidigital number, since it uses as much as digits as its factorization.

12399407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 12399407 is about 3521.2791709832. The cubic root of 12399407 is about 231.4552157397.

The spelling of 12399407 in words is "twelve million, three hundred ninety-nine thousand, four hundred seven".