12806819 has 4 divisors (see below), whose sum is σ = 13104696. Its totient is φ = 12508944.

The previous prime is 12806749. The next prime is 12806861. The reversal of 12806819 is 91860821.

12806819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12806819 is a prime.

It is a super-2 number, since 2×12806819² = 328029225797522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12808819) 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, 148874 + ... + 148959.

It is an arithmetic number, because the mean of its divisors is an integer number (3276174).

Almost surely, 2^12806819 is an apocalyptic number.

12806819 is a deficient number, since it is larger than the sum of its proper divisors (297877).

12806819 is an equidigital number, since it uses as much as digits as its factorization.

12806819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297876.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 12806819 is about 3578.6616213328. The cubic root of 12806819 is about 233.9629510097.

The spelling of 12806819 in words is "twelve million, eight hundred six thousand, eight hundred nineteen".