12813946 has 4 divisors (see below), whose sum is σ = 19220922. Its totient is φ = 6406972.

The previous prime is 12813929. The next prime is 12813959. The reversal of 12813946 is 64931821.

12813946 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 can be written as a sum of positive squares in only one way, i.e., 12680721 + 133225 = 3561^2 + 365^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203485 + ... + 3203488.

Almost surely, 2^12813946 is an apocalyptic number.

12813946 is a deficient number, since it is larger than the sum of its proper divisors (6406976).

12813946 is an equidigital number, since it uses as much as digits as its factorization.

12813946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406975.

The product of its digits is 10368, while the sum is 34.

The square root of 12813946 is about 3579.6572461620. The cubic root of 12813946 is about 234.0063431207.

The spelling of 12813946 in words is "twelve million, eight hundred thirteen thousand, nine hundred forty-six".