12439667 has 2 divisors, whose sum is σ = 12439668. Its totient is φ = 12439666.

The previous prime is 12439643. The next prime is 12439673. The reversal of 12439667 is 76693421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12439667 - 2¹⁸ = 12177523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12439667.

It is not a weakly prime, because it can be changed into another prime (12439607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6219833 + 6219834.

It is an arithmetic number, because the mean of its divisors is an integer number (6219834).

Almost surely, 2^12439667 is an apocalyptic number.

12439667 is a deficient number, since it is larger than the sum of its proper divisors (1).

12439667 is an equidigital number, since it uses as much as digits as its factorization.

12439667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 12439667 is about 3526.9912106497. The cubic root of 12439667 is about 231.7054513560.

The spelling of 12439667 in words is "twelve million, four hundred thirty-nine thousand, six hundred sixty-seven".