197678863 has 2 divisors, whose sum is σ = 197678864. Its totient is φ = 197678862.

The previous prime is 197678861. The next prime is 197678881. The reversal of 197678863 is 368876791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197678863 - 2¹ = 197678861 is a prime.

Together with 197678861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197678861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98839431 + 98839432.

It is an arithmetic number, because the mean of its divisors is an integer number (98839432).

Almost surely, 2^197678863 is an apocalyptic number.

197678863 is a deficient number, since it is larger than the sum of its proper divisors (1).

197678863 is an equidigital number, since it uses as much as digits as its factorization.

197678863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 55.

The square root of 197678863 is about 14059.8315423763. The cubic root of 197678863 is about 582.5323901506.

The spelling of 197678863 in words is "one hundred ninety-seven million, six hundred seventy-eight thousand, eight hundred sixty-three".