196540871 has 2 divisors, whose sum is σ = 196540872. Its totient is φ = 196540870.

The previous prime is 196540867. The next prime is 196540873. The reversal of 196540871 is 178045691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196540871 - 2² = 196540867 is a prime.

Together with 196540873, 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 (196540873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98270435 + 98270436.

It is an arithmetic number, because the mean of its divisors is an integer number (98270436).

Almost surely, 2^196540871 is an apocalyptic number.

196540871 is a deficient number, since it is larger than the sum of its proper divisors (1).

196540871 is an equidigital number, since it uses as much as digits as its factorization.

196540871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 196540871 is about 14019.3035133704. The cubic root of 196540871 is about 581.4124029800.

The spelling of 196540871 in words is "one hundred ninety-six million, five hundred forty thousand, eight hundred seventy-one".