197940822769 has 2 divisors, whose sum is σ = 197940822770. Its totient is φ = 197940822768.

The previous prime is 197940822763. The next prime is 197940822791. The reversal of 197940822769 is 967228049791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121042759744 + 76898063025 = 347912^2 + 277305^2 .

It is a cyclic number.

It is not a de Polignac number, because 197940822769 - 2⁷ = 197940822641 is a prime.

It is a super-2 number, since 2×197940822769² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 197940822769.

It is not a weakly prime, because it can be changed into another prime (197940822763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98970411384 + 98970411385.

It is an arithmetic number, because the mean of its divisors is an integer number (98970411385).

Almost surely, 2^197940822769 is an apocalyptic number.

It is an amenable number.

197940822769 is a deficient number, since it is larger than the sum of its proper divisors (1).

197940822769 is an equidigital number, since it uses as much as digits as its factorization.

197940822769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27433728, while the sum is 64.

The spelling of 197940822769 in words is "one hundred ninety-seven billion, nine hundred forty million, eight hundred twenty-two thousand, seven hundred sixty-nine".