12730897 has 4 divisors (see below), whose sum is σ = 12804660. Its totient is φ = 12657136.

The previous prime is 12730889. The next prime is 12730933. The reversal of 12730897 is 79803721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79803721 = 23 ⋅3469727.

It can be written as a sum of positive squares in 2 ways, for example, as 11082241 + 1648656 = 3329^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 12730897 - 2³ = 12730889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12730877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36622 + ... + 36967.

It is an arithmetic number, because the mean of its divisors is an integer number (3201165).

Almost surely, 2^12730897 is an apocalyptic number.

It is an amenable number.

12730897 is a deficient number, since it is larger than the sum of its proper divisors (73763).

12730897 is an equidigital number, since it uses as much as digits as its factorization.

12730897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73762.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 12730897 is about 3568.0382565214. The cubic root of 12730897 is about 233.4997042488.

The spelling of 12730897 in words is "twelve million, seven hundred thirty thousand, eight hundred ninety-seven".