12987319 has 2 divisors, whose sum is σ = 12987320. Its totient is φ = 12987318.

The previous prime is 12987307. The next prime is 12987329. The reversal of 12987319 is 91378921.

It is a strong prime.

It is an emirp because it is prime and its reverse (91378921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12987319 - 2⁹ = 12986807 is a prime.

It is a super-2 number, since 2×12987319² = 337340909615522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12987329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6493659 + 6493660.

It is an arithmetic number, because the mean of its divisors is an integer number (6493660).

Almost surely, 2^12987319 is an apocalyptic number.

12987319 is a deficient number, since it is larger than the sum of its proper divisors (1).

12987319 is an equidigital number, since it uses as much as digits as its factorization.

12987319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 12987319 is about 3603.7923081110. The cubic root of 12987319 is about 235.0569893474.

The spelling of 12987319 in words is "twelve million, nine hundred eighty-seven thousand, three hundred nineteen".