12319897 has 4 divisors (see below), whose sum is σ = 12328740. Its totient is φ = 12311056.

The previous prime is 12319877. The next prime is 12319907. The reversal of 12319897 is 79891321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79891321 = 8819 ⋅9059.

It can be written as a sum of positive squares in 2 ways, for example, as 3463321 + 8856576 = 1861^2 + 2976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12319897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12319877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822 + ... + 5287.

It is an arithmetic number, because the mean of its divisors is an integer number (3082185).

Almost surely, 2^12319897 is an apocalyptic number.

It is an amenable number.

12319897 is a deficient number, since it is larger than the sum of its proper divisors (8843).

12319897 is an equidigital number, since it uses as much as digits as its factorization.

12319897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8842.

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

The square root of 12319897 is about 3509.9710825020. The cubic root of 12319897 is about 230.9594264178.

The spelling of 12319897 in words is "twelve million, three hundred nineteen thousand, eight hundred ninety-seven".