12978203 has 4 divisors (see below), whose sum is σ = 14832240. Its totient is φ = 11124168.

The previous prime is 12978169. The next prime is 12978211. The reversal of 12978203 is 30287921.

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 12978203 - 2⁶ = 12978139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12978203.

It is not an unprimeable number, because it can be changed into a prime (12978403) 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, 927008 + ... + 927021.

It is an arithmetic number, because the mean of its divisors is an integer number (3708060).

Almost surely, 2^12978203 is an apocalyptic number.

12978203 is a deficient number, since it is larger than the sum of its proper divisors (1854037).

12978203 is an equidigital number, since it uses as much as digits as its factorization.

12978203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854036.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 12978203 is about 3602.5273073219. The cubic root of 12978203 is about 235.0019797630.

The spelling of 12978203 in words is "twelve million, nine hundred seventy-eight thousand, two hundred three".