197128663 has 2 divisors, whose sum is σ = 197128664. Its totient is φ = 197128662.

The previous prime is 197128627. The next prime is 197128693. The reversal of 197128663 is 366821791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197128663 - 2²⁵ = 163574231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197128693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98564331 + 98564332.

It is an arithmetic number, because the mean of its divisors is an integer number (98564332).

Almost surely, 2^197128663 is an apocalyptic number.

197128663 is a deficient number, since it is larger than the sum of its proper divisors (1).

197128663 is an equidigital number, since it uses as much as digits as its factorization.

197128663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 197128663 is about 14040.2515290859. The cubic root of 197128663 is about 581.9914334107.

It can be divided in two parts, 197128 and 663, that added together give a palindrome (197791).

The spelling of 197128663 in words is "one hundred ninety-seven million, one hundred twenty-eight thousand, six hundred sixty-three".