12978673 has 8 divisors (see below), whose sum is σ = 13466880. Its totient is φ = 12498720.

The previous prime is 12978659. The next prime is 12978683. The reversal of 12978673 is 37687921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12978673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12978613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1236 + ... + 5242.

It is an arithmetic number, because the mean of its divisors is an integer number (1683360).

Almost surely, 2^12978673 is an apocalyptic number.

It is an amenable number.

12978673 is a deficient number, since it is larger than the sum of its proper divisors (488207).

12978673 is an equidigital number, since it uses as much as digits as its factorization.

12978673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4127.

The product of its digits is 127008, while the sum is 43.

The square root of 12978673 is about 3602.5925387143. The cubic root of 12978673 is about 235.0048165604.

The spelling of 12978673 in words is "twelve million, nine hundred seventy-eight thousand, six hundred seventy-three".