12948209 has 2 divisors, whose sum is σ = 12948210. Its totient is φ = 12948208.

The previous prime is 12948193. The next prime is 12948211. The reversal of 12948209 is 90284921.

12948209 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 can be written as a sum of positive squares in only one way, i.e., 7997584 + 4950625 = 2828^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 12948209 - 2⁴ = 12948193 is a prime.

It is a super-2 number, since 2×12948209² = 335312232615362, which contains 22 as substring.

Together with 12948211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12948269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6474104 + 6474105.

It is an arithmetic number, because the mean of its divisors is an integer number (6474105).

Almost surely, 2^12948209 is an apocalyptic number.

It is an amenable number.

12948209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12948209 is an equidigital number, since it uses as much as digits as its factorization.

12948209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 12948209 is about 3598.3619884609. The cubic root of 12948209 is about 234.8208019728.

The spelling of 12948209 in words is "twelve million, nine hundred forty-eight thousand, two hundred nine".