12947477 has 2 divisors, whose sum is σ = 12947478. Its totient is φ = 12947476.

The previous prime is 12947471. The next prime is 12947479. The reversal of 12947477 is 77474921.

12947477 is digitally balanced in base 3, 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., 7349521 + 5597956 = 2711^2 + 2366^2 .

It is a cyclic number.

It is not a de Polignac number, because 12947477 - 2⁴ = 12947461 is a prime.

Together with 12947479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12947471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473738 + 6473739.

It is an arithmetic number, because the mean of its divisors is an integer number (6473739).

Almost surely, 2^12947477 is an apocalyptic number.

It is an amenable number.

12947477 is a deficient number, since it is larger than the sum of its proper divisors (1).

12947477 is an equidigital number, since it uses as much as digits as its factorization.

12947477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 41.

The square root of 12947477 is about 3598.2602740769. The cubic root of 12947477 is about 234.8163768546.

The spelling of 12947477 in words is "twelve million, nine hundred forty-seven thousand, four hundred seventy-seven".