196543871 has 2 divisors, whose sum is σ = 196543872. Its totient is φ = 196543870.

The previous prime is 196543859. The next prime is 196543877. The reversal of 196543871 is 178345691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196543871 - 2⁶ = 196543807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196543877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98271935 + 98271936.

It is an arithmetic number, because the mean of its divisors is an integer number (98271936).

Almost surely, 2^196543871 is an apocalyptic number.

196543871 is a deficient number, since it is larger than the sum of its proper divisors (1).

196543871 is an equidigital number, since it uses as much as digits as its factorization.

196543871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 196543871 is about 14019.4105082917. The cubic root of 196543871 is about 581.4153611914.

The spelling of 196543871 in words is "one hundred ninety-six million, five hundred forty-three thousand, eight hundred seventy-one".