12399679 has 2 divisors, whose sum is σ = 12399680. Its totient is φ = 12399678.

The previous prime is 12399677. The next prime is 12399683. The reversal of 12399679 is 97699321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12399679 - 2¹ = 12399677 is a prime.

Together with 12399677, 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 (12399677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6199839 + 6199840.

It is an arithmetic number, because the mean of its divisors is an integer number (6199840).

Almost surely, 2^12399679 is an apocalyptic number.

12399679 is a deficient number, since it is larger than the sum of its proper divisors (1).

12399679 is an equidigital number, since it uses as much as digits as its factorization.

12399679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 46.

The square root of 12399679 is about 3521.3177930996. The cubic root of 12399679 is about 231.4569081690.

The spelling of 12399679 in words is "twelve million, three hundred ninety-nine thousand, six hundred seventy-nine".