12968209 has 2 divisors, whose sum is σ = 12968210. Its totient is φ = 12968208.

The previous prime is 12968171. The next prime is 12968213. The reversal of 12968209 is 90286921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9828225 + 3139984 = 3135^2 + 1772^2 .

It is a cyclic number.

It is not a de Polignac number, because 12968209 - 2⁹ = 12967697 is a prime.

It is not a weakly prime, because it can be changed into another prime (12968269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6484104 + 6484105.

It is an arithmetic number, because the mean of its divisors is an integer number (6484105).

Almost surely, 2^12968209 is an apocalyptic number.

It is an amenable number.

12968209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12968209 is an equidigital number, since it uses as much as digits as its factorization.

12968209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 12968209 is about 3601.1399584021. The cubic root of 12968209 is about 234.9416423675.

The spelling of 12968209 in words is "twelve million, nine hundred sixty-eight thousand, two hundred nine".