12947471 has 2 divisors, whose sum is σ = 12947472. Its totient is φ = 12947470.

The previous prime is 12947461. The next prime is 12947477. The reversal of 12947471 is 17474921.

It is a strong prime.

It is an emirp because it is prime and its reverse (17474921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12947471 is a prime.

It is a super-3 number, since 3×12947471³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12947477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473735 + 6473736.

It is an arithmetic number, because the mean of its divisors is an integer number (6473736).

Almost surely, 2^12947471 is an apocalyptic number.

12947471 is a deficient number, since it is larger than the sum of its proper divisors (1).

12947471 is an equidigital number, since it uses as much as digits as its factorization.

12947471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 12947471 is about 3598.2594403406. The cubic root of 12947471 is about 234.8163405824.

The spelling of 12947471 in words is "twelve million, nine hundred forty-seven thousand, four hundred seventy-one".