197841863 has 2 divisors, whose sum is σ = 197841864. Its totient is φ = 197841862.

The previous prime is 197841841. The next prime is 197841881. The reversal of 197841863 is 368148791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197841863 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197841263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98920931 + 98920932.

It is an arithmetic number, because the mean of its divisors is an integer number (98920932).

Almost surely, 2^197841863 is an apocalyptic number.

197841863 is a deficient number, since it is larger than the sum of its proper divisors (1).

197841863 is an equidigital number, since it uses as much as digits as its factorization.

197841863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 197841863 is about 14065.6270034435. The cubic root of 197841863 is about 582.6924590147.

The spelling of 197841863 in words is "one hundred ninety-seven million, eight hundred forty-one thousand, eight hundred sixty-three".