12728479 has 2 divisors, whose sum is σ = 12728480. Its totient is φ = 12728478.

The previous prime is 12728447. The next prime is 12728503. The reversal of 12728479 is 97482721.

12728479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12728479 - 2⁵ = 12728447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12728179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364239 + 6364240.

It is an arithmetic number, because the mean of its divisors is an integer number (6364240).

Almost surely, 2^12728479 is an apocalyptic number.

12728479 is a deficient number, since it is larger than the sum of its proper divisors (1).

12728479 is an equidigital number, since it uses as much as digits as its factorization.

12728479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 12728479 is about 3567.6993987723. The cubic root of 12728479 is about 233.4849203198.

The spelling of 12728479 in words is "twelve million, seven hundred twenty-eight thousand, four hundred seventy-nine".