197945424793 has 2 divisors, whose sum is σ = 197945424794. Its totient is φ = 197945424792.

The previous prime is 197945424779. The next prime is 197945424821. The reversal of 197945424793 is 397424549791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197534024704 + 411400089 = 444448^2 + 20283^2 .

It is an emirp because it is prime and its reverse (397424549791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197945424793 is a prime.

It is not a weakly prime, because it can be changed into another prime (197945424713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98972712396 + 98972712397.

It is an arithmetic number, because the mean of its divisors is an integer number (98972712397).

Almost surely, 2^197945424793 is an apocalyptic number.

It is an amenable number.

197945424793 is a deficient number, since it is larger than the sum of its proper divisors (1).

197945424793 is an equidigital number, since it uses as much as digits as its factorization.

197945424793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 64.

The spelling of 197945424793 in words is "one hundred ninety-seven billion, nine hundred forty-five million, four hundred twenty-four thousand, seven hundred ninety-three".