12447667 has 2 divisors, whose sum is σ = 12447668. Its totient is φ = 12447666.

The previous prime is 12447613. The next prime is 12447703. The reversal of 12447667 is 76674421.

It is a strong prime.

It is an emirp because it is prime and its reverse (76674421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12447667 - 2²³ = 4059059 is a prime.

It is not a weakly prime, because it can be changed into another prime (12447767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6223833 + 6223834.

It is an arithmetic number, because the mean of its divisors is an integer number (6223834).

Almost surely, 2^12447667 is an apocalyptic number.

12447667 is a deficient number, since it is larger than the sum of its proper divisors (1).

12447667 is an equidigital number, since it uses as much as digits as its factorization.

12447667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 37.

The square root of 12447667 is about 3528.1251395040. The cubic root of 12447667 is about 231.7551109487.

It can be divided in two parts, 1244 and 7667, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 12447667 in words is "twelve million, four hundred forty-seven thousand, six hundred sixty-seven".