12664319 has 2 divisors, whose sum is σ = 12664320. Its totient is φ = 12664318.

The previous prime is 12664307. The next prime is 12664343. The reversal of 12664319 is 91346621.

It is a weak prime.

It is an emirp because it is prime and its reverse (91346621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12664319 - 2⁸ = 12664063 is a prime.

It is a super-2 number, since 2×12664319² = 320769951467522, which contains 22 as substring.

It is a Chen prime.

It is equal to p₈₂₈₇₄₃ and since 12664319 and 828743 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12664369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332159 + 6332160.

It is an arithmetic number, because the mean of its divisors is an integer number (6332160).

Almost surely, 2^12664319 is an apocalyptic number.

12664319 is a deficient number, since it is larger than the sum of its proper divisors (1).

12664319 is an equidigital number, since it uses as much as digits as its factorization.

12664319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 12664319 is about 3558.6962500331. The cubic root of 12664319 is about 233.0919528753.

The spelling of 12664319 in words is "twelve million, six hundred sixty-four thousand, three hundred nineteen".