12309719 has 2 divisors, whose sum is σ = 12309720. Its totient is φ = 12309718.

The previous prime is 12309707. The next prime is 12309721. The reversal of 12309719 is 91790321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12309719 - 2²⁰ = 11261143 is a prime.

It is a super-2 number, since 2×12309719² = 303058363717922, which contains 22 as substring.

Together with 12309721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12309749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6154859 + 6154860.

It is an arithmetic number, because the mean of its divisors is an integer number (6154860).

Almost surely, 2^12309719 is an apocalyptic number.

12309719 is a deficient number, since it is larger than the sum of its proper divisors (1).

12309719 is an equidigital number, since it uses as much as digits as its factorization.

12309719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 12309719 is about 3508.5209134335. The cubic root of 12309719 is about 230.8958070364.

The spelling of 12309719 in words is "twelve million, three hundred nine thousand, seven hundred nineteen".