19471 has 2 divisors, whose sum is σ = 19472. Its totient is φ = 19470.

The previous prime is 19469. The next prime is 19477. The reversal of 19471 is 17491.

It is a weak prime.

It is an emirp because it is prime and its reverse (17491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19471 - 2¹ = 19469 is a prime.

It is a super-3 number, since 3×19471³ = 22145527272333, which contains 333 as substring.

Together with 19469, 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 (19477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9735 + 9736.

It is an arithmetic number, because the mean of its divisors is an integer number (9736).

2¹⁹⁴⁷¹ is an apocalyptic number.

19471 is a deficient number, since it is larger than the sum of its proper divisors (1).

19471 is an equidigital number, since it uses as much as digits as its factorization.

19471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 22.

The square root of 19471 is about 139.5385251463. The cubic root of 19471 is about 26.9027134349.

The spelling of 19471 in words is "nineteen thousand, four hundred seventy-one".