12730823 has 4 divisors (see below), whose sum is σ = 14549520. Its totient is φ = 10912128.

The previous prime is 12730819. The next prime is 12730829. The reversal of 12730823 is 32803721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12730823 - 2² = 12730819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12730792 and 12730801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12730829) 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, 909338 + ... + 909351.

It is an arithmetic number, because the mean of its divisors is an integer number (3637380).

Almost surely, 2^12730823 is an apocalyptic number.

12730823 is a deficient number, since it is larger than the sum of its proper divisors (1818697).

12730823 is an equidigital number, since it uses as much as digits as its factorization.

12730823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818696.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 12730823 is about 3568.0278866623. The cubic root of 12730823 is about 233.4992518321.

The spelling of 12730823 in words is "twelve million, seven hundred thirty thousand, eight hundred twenty-three".