12664019 has 2 divisors, whose sum is σ = 12664020. Its totient is φ = 12664018.

The previous prime is 12663991. The next prime is 12664021. The reversal of 12664019 is 91046621.

12664019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12664019 is a prime.

It is a super-2 number, since 2×12664019² = 320754754464722, which contains 22 as substring.

Together with 12664021, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12663982 and 12664000.

It is not a weakly prime, because it can be changed into another prime (12664049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332009 + 6332010.

It is an arithmetic number, because the mean of its divisors is an integer number (6332010).

Almost surely, 2^12664019 is an apocalyptic number.

12664019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12664019 is an equidigital number, since it uses as much as digits as its factorization.

12664019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 12664019 is about 3558.6540995157. The cubic root of 12664019 is about 233.0901123200.

The spelling of 12664019 in words is "twelve million, six hundred sixty-four thousand, nineteen".