12968643 has 4 divisors (see below), whose sum is σ = 17291528. Its totient is φ = 8645760.

The previous prime is 12968639. The next prime is 12968651. The reversal of 12968643 is 34686921.

12968643 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 not a de Polignac number, because 12968643 - 2² = 12968639 is a prime.

It is a super-2 number, since 2×12968643² = 336371402522898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12968653) 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, 2161438 + ... + 2161443.

It is an arithmetic number, because the mean of its divisors is an integer number (4322882).

Almost surely, 2^12968643 is an apocalyptic number.

12968643 is a deficient number, since it is larger than the sum of its proper divisors (4322885).

12968643 is an equidigital number, since it uses as much as digits as its factorization.

12968643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322884.

The product of its digits is 62208, while the sum is 39.

The square root of 12968643 is about 3601.2002165945. The cubic root of 12968643 is about 234.9442632264.

The spelling of 12968643 in words is "twelve million, nine hundred sixty-eight thousand, six hundred forty-three".