197165543 has 2 divisors, whose sum is σ = 197165544. Its totient is φ = 197165542.

The previous prime is 197165539. The next prime is 197165569. The reversal of 197165543 is 345561791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197165543 - 2² = 197165539 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197165543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197165743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98582771 + 98582772.

It is an arithmetic number, because the mean of its divisors is an integer number (98582772).

Almost surely, 2^197165543 is an apocalyptic number.

197165543 is a deficient number, since it is larger than the sum of its proper divisors (1).

197165543 is an equidigital number, since it uses as much as digits as its factorization.

197165543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 197165543 is about 14041.5648344478. The cubic root of 197165543 is about 582.0277252845.

The spelling of 197165543 in words is "one hundred ninety-seven million, one hundred sixty-five thousand, five hundred forty-three".