197399863 has 2 divisors, whose sum is σ = 197399864. Its totient is φ = 197399862.

The previous prime is 197399861. The next prime is 197399879. The reversal of 197399863 is 368993791.

197399863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197399863 - 2¹ = 197399861 is a prime.

Together with 197399861, 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 (197399861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98699931 + 98699932.

It is an arithmetic number, because the mean of its divisors is an integer number (98699932).

Almost surely, 2^197399863 is an apocalyptic number.

197399863 is a deficient number, since it is larger than the sum of its proper divisors (1).

197399863 is an equidigital number, since it uses as much as digits as its factorization.

197399863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 55.

The square root of 197399863 is about 14049.9061562702. The cubic root of 197399863 is about 582.2582029215.

The spelling of 197399863 in words is "one hundred ninety-seven million, three hundred ninety-nine thousand, eight hundred sixty-three".