82143671 has 2 divisors, whose sum is σ = 82143672. Its totient is φ = 82143670.

The previous prime is 82143661. The next prime is 82143673. The reversal of 82143671 is 17634128.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82143671 is a prime.

Together with 82143673, 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 (82143673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41071835 + 41071836.

It is an arithmetic number, because the mean of its divisors is an integer number (41071836).

Almost surely, 2^82143671 is an apocalyptic number.

82143671 is a deficient number, since it is larger than the sum of its proper divisors (1).

82143671 is an equidigital number, since it uses as much as digits as its factorization.

82143671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 82143671 is about 9063.3145702883. The cubic root of 82143671 is about 434.7017306165.

Adding to 82143671 its reverse (17634128), we get a palindrome (99777799).

The spelling of 82143671 in words is "eighty-two million, one hundred forty-three thousand, six hundred seventy-one".